Kara Zor-El / Kara Danvers / Supergirl Kara Zor-El / Kara Danvers / Supergirl (
Melissa Benoist as an adult, seasons 1–6;
Malina Weissman and
Izabela Vidovic as a teenager) is a 24-year-old
Kryptonian living in National City, who must embrace her powers after previously hiding them. When her pod crashed on Earth at a young age, she was found by her cousin Superman and was taken to live with his friend Jeremiah Danvers. She assists her adoptive sister, Alex Danvers, as part of the
Department of Extranormal Operations (DEO). She discovers the truth that Jeremiah Danvers also worked for the DEO, so they would not take Kara. Alex's co-workers at the DEO help Kara to perfect her powers. Kara has a day job, working as
Cat Grant's assistant at CatCo. Kara learns of the existence of metahumans and the
multiverse when she befriends
Barry Allen, aka the Flash, a superhero from a parallel Earth (Earth-1). Benoist expressed her excitement over portraying the character, and being able to "(tell) a story about a human being really realizing their potential and their strength".
Claire Holt and
Gemma Atkinson were considered for the role. In season two, Kara deals with feuds between Earth's native populace and the extraterrestrial community, and struggles with romantic feelings for
Daxamite prince Mon-El. She learns that Superman was formerly a member of the DEO, making her his successor within the organization. She becomes close with Lex Luthor's paternal half-sister Lena, and is targeted by Luthor's mother, Lilian, leader of
Project Cadmus, an organization now dedicated to the exploitation and destruction of all aliens. Kara's adversaries include Mon-El's mother, Rhea, who wants to retrieve her son, the prince of Daxam, and invade Earth. Kara also becomes a visiting superhero to Earth-1 and a recurring ally of its heroes, including Barry's best friend,
Oliver Queen, the vigilante archer Green Arrow. In season three, Kara deals with the threat of Selena and the Worldkillers, including a new character, Samantha "Sam" Arias/Reign, another refugee from
Krypton who is at first unaware of her origins and of her evil persona. Eventually Sam and Reign are physically separated, and Sam killed Reign at the cost of her own life and others'. Kara travels back in time to save Sam and prevent the sacrifice of Mon-El and of Kara's mother, Alura, who has survived Krypton. Kara takes the Harun-El (Black
Kryptonite) with Sam and Reign into the Fountain of Lilith, taking down Reign. Unbeknownst to her, another Kara appears in the border of
Siberia. In season four, Kara deals with a new wave of anti-alien sentiment from the public, both as Supergirl and as a CatCo reporter. The hostility is secretly orchestrated by Lex Luthor. During the fight at Shelly Island, Supergirl fights against Lex Luthor using a special lead suit. Red Daughter sacrifices her life to give Supergirl the opportunity to defeat Lex Luthor. In season five, Kara finds that CatCo is bought out by Andrea Rojas and she also contends with
Leviathan. During the "
Arrowverse", Supergirl, Superman, and Lois Lane work with their Earth-1 allies in their attempt to save the people of Earth-38 and becomes one of the Paragons at the cost of Oliver Queen. When Anti-Monitor destroys most of the Multiverse, Kara and the rest of the Paragons fight Anti-Monitor and the Shadow Demons. Oliver's second sacrifice as Spectre resulted in the creation of Earth-Prime where she finds that Lex Luthor was never a bad guy and LuthorCorp owns the DEO After finding that her Earth merged with Flash's Earth and Black Lightning's unnamed Earth, Supergirl and her allies fight the Anti-Monitor again. Afterwards, Supergirl contends with the plots of Lex Luthor and Leviathan. In season six, Kara is sent to the
Phantom Zone during the fight against Lex Luthor. She reunites with her father Zor-El and meets a 5th Dimension Imp named Nyxlygsptlnz as she works to escape. Kara and Zor-El were later rescued by the Super Friends using a sun bomb. By the end of season six following Lex Luthor and Nyxlygsptlnz being dragged into the Phantom Zone, Kara finds out that Cat knows of her secret identity and is convinced to reveal it upon accepting the position of editor-in-chief at CatCo.
Overgirl During the "
Crisis on Earth-X" crossover, Benoist also portrays
Overgirl, a fascistic parallel-universe counterpart of Supergirl from the Nazi-ruled world, Earth-X. Other performers superimposed in Benoist's likeness include her stunt double Jennifer Clarke. Overgirl is also referred to by Harry Wells and
Cisco Ramon as
Supergirl-X and
Kara-X. The Earth-X Kara Zor-El is married to the Führer of Earth-X, Oliver Queen's doppelgänger,
Dark Arrow. After Overgirl's heart is damaged, her husband tries and fails to seize Kara's heart to replace it. Overgirl dies, going supernova and exploding in space.
Red Daughter In season four, Kara deals with a new wave of anti-alien sentiment from the public, both as Supergirl and as a CatCo reporter. The hostility is secretly orchestrated by Lex Luthor. Kara's Harun-El-replicated clone,
Red Daughter (also portrayed by Benoist), is in the nation
Kasnia, where she is being tested and trained by its military forces. It is revealed later that this is part of Luthor's latest scheme to defeat both Supergirl and Superman. Red Daughter has no memories or knowledge of her origins, and she sees Luthor as a mentor. She speaks Russian fluently. Kara's clone is eventually betrayed and presumably killed by Luthor after she has completed her part of his plan. During the fight at Shelly Island, Supergirl fights against Lex Luthor using a special lead suit. Red Daughter sacrifices her life to give Supergirl the opportunity to defeat Lex Luthor.
James Olsen / Guardian James Olsen (
Mehcad Brooks; main: seasons 1–5; guest: season 6) is a former
Daily Planet photographer who moved to National City and became the new
art director for his former colleague, Cat Grant's media company, CatCo Worldwide Media. He is a potential love interest for Kara. Among his reasons for moving across the country include his breakup with his girlfriend Lucy Lane (with whom he has since reconciled), and keeping an eye on the newly revealed Supergirl for
Superman, who considers him a close friend. While working at the
Daily Planet, James received a
Pulitzer Prize for taking the first photograph of Superman. In season two, though initially attracted to each other, James and Kara decided that they are incompatible as a couple but remain friends. With Winn's help, James becomes
Guardian. He was also named acting CEO of CatCo after Cat Grant took a sabbatical from the company. In season three, James and Lena Luthor begin a relationship. By the end of season three, James reveals himself to the public as the Guardian. In season four, James works to help Supergirl in battling the Children of Liberty. After CatCo prints a story about the alien march, James is shot by an unseen sniper. It was discovered that the sniper was a thought-to-be-dead Otis who survived the Hellgrammite attack. After being injected with a Harun-El serum, while dealing with a traumatic stress, James begins to developing metahuman abilities similar to Kryptonians'. During the fight against Agent Liberty at Shelly Island, James and Agent Liberty remove the Harun-El serum from each other. In season five, James is replaced by Andrea Rojas as editor-in-chief of CatCo and quits after refusing to support her sensationalist plans. He later leaves National City and returns to his hometown Calvinville to take over its newspaper. In season six, James returns as Guardian to help the Super Friends fight Lex Luthor and Nyxlygsptlnz. He was also present at Kelly and Alex's wedding. • Brooks briefly portrays a parallel universe version of his character from Earth-X, where he was a member of an underground resistance against the New Reich, the
Freedom Fighters. This James Olsen / Guardian is killed by Dark Arrow after a fight. • In the season four crossover
Elseworlds, Brooks portrays the Earth-1 version of Olsen, who works as a bodyguard for Cisco Ramon.
Alex Danvers Alexandra "Alex" Danvers (
Chyler Leigh as an adult; seasons 1–6; Jordan Mazarati and Olivia Nikkanen as a teenager with the latter also portraying her VR counterpart In season two, he has left CatCo for a full-time position at the DEO recruited by Alex Danvers and J'onn J'onzz. He returns to the present in pursuit of his doppelganger who has done things that caused the real Winn to be wanted for terrorism. Winn does give advice to Nia about certain things while referencing her descendant. Supergirl and the DEO were able to thwart the attempt of the lives of Andrea Rojas and those present at her presentation, but Toyman perishes. This changes Winn's future where he no longer a wanted man. When his alternate counterpart's mind is uploaded into the DEO's computers, Winn enters the computers and reluctantly accepts the aid of his father's digital consciousness. Winn was able to stop the hack as Toyman and the alternate Toyman are deleted. At one point, Winn mentioned that he was called Computer Lad by a member of the Legion of Super Heroes. As he plans to return to the future, Winn plans to become a different Toyman. In season six, Toyman appears to help fight Lex Luthor and Nyxlygsptlnz. He later appears at Alex and Kelly's wedding where he hints to J'onn that he and Miss Martian will have a son while also mentioning to Kara and Jimmy that Mister Mxyzptlk owes Alex and Kelly a wish. • During the "Crisis on Earth-X" crossover, an Earth-X version of Winn is introduced that is also portrayed by Jordan. He is the leader of the Freedom Fighters working against the New Reich on his world and thus Dark Arrow's chief adversary. • Jordan also portrays a version of Winn from an unnamed reality. He took on the mantle of Toyman following the death of his father and shares his vendetta on Chester Dunholz as well as the Rojas family. It is because of Toyman's actions that cause Winn to be wanted for terrorism in the future. Toyman was freed from a prison transport by Brainiac 5 on Lex Luthor's behalf. In his plot, he planned to dispose of Andrea Rojas that involved robotic
white tigers. While Supergirl and the DEO fought the robotic white tigers, Winn confronted Toyman. Toyman perished after activating the dead man switch to a bomb he made, but Supergirl was able to save everyone from the explosion. It turns out that he used the Obsidian Tech lenses to upload himself into the DEO's computer at the last minute to access the Internet. With help from the digital copy of his dad's conscious, Winn enters the codes while Toyman subdues his son's alternate counterpart. Once Winn finishes entering the codes, both digital consciousnesses are deleted.
J'onn J'onzz / Martian Manhunter J'onn J'onzz (
David Harewood; seasons 1–6) is the head of the DEO who takes Hank Henshaw's likeness after Henshaw is killed in Peru while hunting J'onn. J'onn takes Henshaw's likeness to reform the DEO from within as well as a promise to Jeremiah Danvers to watch over Alex and Kara, who each subsequently trust him as a mentor after learning of his true identity. Prior to his escape from the holocaust on Mars, J'onn was a law enforcement officer to his people. In addition to his powers, J'onn learned various skills and knowledge after living on Earth over decades including martial arts, strategy, investigation tactics, in addition telepathically learned some of Henshaw's memories and knowledge, making him a formidable opponent when in human form without the need of his extraterrestrial abilities and more than capable to run the DEO in Henshaw's place. He takes Alex in as his protégée and forges her as a strong DEO agent, eventually she becomes his right-hand operative. In the episode "
Falling", J'onn reveals to the whole world his true identity to stop Kara, who is affected by Red Kryptonite, from killing Alex. He is then arrested by the DEO agents who are at the scene, only to escape with Alex upon learning that Jeremiah has survived the attack and that he is being held at Project Cadmus, a facility that experiments with aliens and where he was going to be taken. In season two, J'onn begins a romantic relationship with a benevolent member of the White Martian race,
M'gann M'orzz. In season three, it is revealed that J'onn's father is alive and they struggle to reconcile of their relationship. His spaceship is disguised as a 1952 vintage
Chevrolet Deluxe convertible, in which J'onn, Kara, and Alex love to drive for pleasure. By the end of season three, after he succeeds the memory and knowledge from his father, J'onn leaves the DEO. In season four, J'onn helps run a support group for aliens trying to integrate into Earth society. He also begins a career as a private investigator. He eschews combat, preferring to provide guidance and mentorship. He warns Kara of a rising wave of anti-alien bigotry. In addition, he starts to go after Manchester Black. During the fight at Shelly Island where they were imprisoned, J'onn and Dreamer use their abilities to overload the core of the satellite before it can be fired on Argo where Superman is. In season five, J'onn assisted in the investigation of Leviathan and deals with his brother Malefic. After reconciling with Malefic and sending him to meet with M'gann, J'onn is approached by the Monitor who stated that he passed this test to prepare himself for the upcoming Crisis. Following the Crisis which led to the formation of Earth-Prime, J'onn worked to restore the memories of their allies as well as assisted in fighting the Anti-Monitor. J'onn later provided Alex with a special suit to help in the fight against Leviathan. In season six, J'onn assists in the fight against Lex Luthor while joining M'gann to use a Martian ritual to destroy the satellites. While Malefic is unable to help locate the part of the Phantom Zone that Lex Luthor sent her to, J'onn informs Alex that M'gann is enlisting someone who can help and tells the story of Norr Cott who operated as the Sentinel. He then advises Alex to take on the Sentinel alias. Following the defeat of Lex and Nyxlygsptlnz, J'onn officiates Alex and Kelly's wedding. Toyman does drop a hint to him that he and M'gann will have a son. The evolution of Henshaw was discussed during the filming of the pilot, with the executive producers jokingly saying that Harewood would be a good actor to play the Martian Manhunter in a potential television series, to which
DC Comics'
Geoff Johns asked why it could not be done in
Supergirl. Harewood reflected that he had a difficult time "find[ing] an angle to play Hank Henshaw" in the pilot, and became excited when he was told about the change for his character's backstory.
Hank Henshaw / Cyborg Superman Harewood also recurs as the real Hank Henshaw, a former
CIA agent and ex-head of the DEO who is ruthless and obsessed with hunting down aliens he believed to be dangerous. He died after he stabbed Jeremiah Danvers in Peru while hunting the alien J'onn J'onzz. Hank was subsequently found and revived by Project Cadmus, who enhanced him to become the Cyborg Superman. In season five, a virtual reality version of Hank Henshaw stole a warhead in a plot to regain the DEO After capturing Kara, he is defeated by Alex as Supergirl.
Cat Grant Cat Grant (
Calista Flockhart; main: season 1; recurring: season 2; guest: seasons 3–4 & 6, Eliza Helm as a younger Cat in season 6) is the founder and CEO of CatCo Worldwide Media, who feels, since she "branded" Kara as "Supergirl", that she has proprietary custody over the new hero. She was the personal assistant to
Perry White prior to being a
gossip columnist at the
Daily Planet. Cat investigates and reveals that Supergirl is Superman's cousin, which then causes her to become a target for some of Superman's enemies. She also serves as a mentor to Kara, dispensing advice about being a woman in a man's world. In the episode "
Hostile Takeover", she begins to suspect that Kara is Supergirl, while the second-season finale reveals she knew Kara was Supergirl all along. Flockhart became a recurring actress for season two, due to the series' production shift to Vancouver and her desire to take on projects near her Los Angeles home. To accommodate this, Cat decides to take a leave of absence from CatCo, leaving James in charge during the second episode of season two. She returns in the final two episodes to help protect National City from the Daxamite invasion. Flockhart remained a recurring guest star for season three. In the first episode of season three, it is revealed that Cat has become Olivia Marsdin's
Press Secretary. In season five, a possible reality shown to Supergirl by Mxyzptlk revealed that Cat was among Kara's loved ones who were killed by the Children of Liberty when Kara was provoked to reveal her identity after the Children of Liberty abducted Lena Luthor and Thomas Coville. In season six, a younger Cat Grant, going by "CJ Grant" as Perry White called her, comes to Midvale to look for the source of Midvale's luck to outdo Lois Lane's story and runs into a younger Alex posing as Eliza Danvers. After attempts to get close to Supergirl that led to her encounter with Naxim Tork, Dreamer in her Brenda alias persuades her to branch off from the
Daily Bugle. Cat is later called up by Perry and informs him of her resignation while telling her to call her Cat Grant. Following the defeat of Lex Luthor and Nyxlygsptlnz, Cat calls up Kara offering her the position of editor-in-chief after buying CatCo back from Andrea Rojas. She also figured out that Kara is Supergirl and persuades her to come forward with revealed it to the world.
Mon-El Mon-El (
Chris Wood; main: seasons 2–3; guest: seasons 5–6) is a survivor and prince of a royal family from the planet Daxam who seeks to become a superhero on Earth. Owing to Daxamites being an offshoot of Kryptonians, Mon-El has similar powers to Superman and Supergirl. Mon-El crash lands on Earth in an escape pod at the end of season one. His carefree and somewhat laid-back nature leads to friction with Kara as she mentors him in the ways of being a hero. Mon-El eventually falls in love with Kara and they become a couple. After Kara triggers a weapon that laces the atmosphere with lead dust to stop Rhea's Daxamite army, Mon-El is forced to leave Earth. In season three, it is revealed that Mon-El's pod was sucked into a wormhole and he time-traveled to the 31st century. He was in the future for seven years, where L-Corp administered a serum that gives him immunity to lead poisoning. Despite his love for Kara, Mon-El ultimately marries
Imra Ardeen before he returns to the 21st century with her and other passengers for an unknown mission. He is also revealed to be the founder of the superhero team, the
Legion. In between seasons three and four, Mon-El and the other Legionnaires returned to the 31st century, though Brainy stayed behind. In season five, Mon-El is shown in some possible realities that Mxyzptlk shows Kara. The first one has him and Lena falling in battle against Reign. Another reality where Supergirl and Lena didn't meet as Mon-El as part of a resistance against Lena and her Hope-Bots. In season six, Mon-El is among those that help the Super Friends fight Lex Luthor and Nyxlygsptlnz. Afterwards, Mon-El tells Supergirl that he won't be returning to her time again.
Maggie Sawyer Maggie Sawyer (
Floriana Lima; main: season 2; recurring: season 3) is a detective for the National City Police Department who takes a special interest in the cases involving aliens, metahumans, and other extraordinary occurrences. She uses her own experience as a lesbian to help guide Alex as the latter struggles to understand her own sexuality, and the two eventually begin a romantic relationship. However, in season three because Maggie does not want to have children, Alex breaks up with her, with Maggie telling Alex that she'll be a great mom when the time comes. Lima became a recurring actress for season three. She noted the role was only intended to last for one season.
Lena Luthor Lena Kieran Luthor (
Katie McGrath; main: seasons 3–6; recurring: season 2, Lucy Loken as a teenager) is the CEO of L-Corp (formerly known as Luthor Corp) and the younger paternal half-sister of
Lex Luthor. She arrives in National City after Lex has been incarcerated, hoping to rebrand Luthor Corp as a force for good. As the daughter of
Lionel Luthor, to whom she is close, Lena tries to redeem her family name after Lex's crimes have tarnished it and to break from her half-brother and step-mother's legacy. Lena is Lionel's illegitimate child from his extramarital affair. Lena meets Kara after Kara tags along with her cousin, Clark Kent, to interview Lena about L-Corp. Shortly after, the two develop a strong friendship. Later in the season she is taken advantage of by Rhea, under guise of fixing the portal to get her home, but instead brought all the Daxamites to Earth. She is almost married off to Mon-El before the wedding is interrupted and they escape where she then aids her mother and Winn in driving away the Daxamites with a lead bomb. Camille Marty portrays a young Lena. McGrath was promoted to series regular for season three. In season three, she buys CatCo Media to prevent Morgan Edge from taking it over and decides to run CatCo personally, temporarily handing over control of L-Corp to Sam Arias. Unlike her half-brother, Lena is able to develop a formula to create synthetic Kryptonites. By the end of season 3, Lena synthesizes the Kryptonian mineral Harun-El in her laboratory since it is a form of Black Kryptonite, and starts the phase 2 of her experiment. In season four, Lena helped to make a special suit for Supergirl when the air was saturated with Kryptonite. Lex later invites Lena and Lillian to the White House to watch the destruction of Argo. After an incident at Shelly Island causes Lex to leave, Lena and Lillian fight their way past Lex's henchmen. After Lex teleports to safety upon his armor being destroyed, he arrives in a room where Lena removes the Harun-El from him. Before succumbing to his wounds, Lex spitefully reveals to Lena that Kara is Supergirl; leaving her bitter and heartbroken. In season five, this perceived betrayal has led Lena to go down a dark path; similar to Lex and Lillian respectively. She buys out CatCo's building so that her old friend Andrea Rojas can run CatCo and keep an eye on Kara while running some simulations with her A.I. Hope. In addition, she also blackbags Eve, Using a miniature device on Eve's head, Lena maps out Eve's brain. Andrea visits Lena voicing her knowledge about Lena's misuse of her products and states that she is cut off. If she ever does anything against her, Andrea will see to it that the next story will expose Lena's experiments. Afterwards, Lena moves on to Plan B where she reveals that she mapped out the loyalty parts of Eve's brain where she uploads Hope into it enabling Hope to control Eve's body. After being visited by Andrea, Lena provides the diversion for Supergirl so that Acrata can spring Rip Roar out of DEO custody. Once that was done, Andrea gave Lena the medallion. Then she has her computers research Eve's brain for any information about Leviathan. After Lex was revived, he said that he would help Monitor in exchange for a favor that involved Lena. When the Crisis began, Lena was persuaded by Alex to help work on a transporter to transport everyone from Earth-38 to Earth-1, resulting in Lena saving billions of lives. Following the Crisis which led to the formation of Earth-Prime, Lena still had her memories as part of Lex's deal with the Monitor and that she and Lex are now co-CEO's of LuthorCorp. In addition, Lena finds that Lillian is the head of the Luthor Foundation. Lena reluctantly had to cooperate with her two family members as Lex used a truth-enforcing organism on himself. Following the Non Nocere experiment failing on the inmates, Lena learned from Lex that her project would fail anyway and he had only assisted her to see her realise that she was wrong. Rejecting her brother's offer to join his own plans of conquest, and horrified to realise that she had become the same kind of villain as her brother, Lena returned to Kara to warn her about Lex's plans. Lena makes an Anti-Kryptonite suit that wasn't on Earth-Prime so that Supergirl can fight Rama Khan, Tezumak, and Sela who are empowered by Kryptonite while also rescuing William Dey from Eve. When Supergirl enters virtual reality to put an end to the Unity Festival plot, Lena had to protect her physical body when Acrata is dispatched. Lena was able to talk her down. Afterwards, Supergirl and Lena plan to go after Lex. In season six, Lena helps to thwart the plans of Lex and Lillian. When Lex was incarcerated at the National City Prison and being visited by Lillian, Lena appears and uses the Myriad to erase their memories of Supergirl's identity and then gives Myriad back to Alex. Owing to Lex having Otis sabotage the new children's hospital wing and considering that killing him won't solve anything, Lena informs Lex that she is leaving LuthorCorp. She joins the Tower, using her scientific and technological expertise to help J'onn J'onzz, Alex, and the other Super Friends. She learns that her birth mother was a practitioner of magic, and that she possesses the same ability. As a scientist, she is reluctant to accept this, but she ultimately embraces magic to fight Nyxly, a fifth-dimensional imp; who uses fifth-dimensional energy which is similar to magic. A dying Lillian tells Lena that she knew about her birth mother's magic, and steered Lena towards science because of it; Lillian urges Lena to choose her own path, free from anyone's expectations. After Nyxly's defeat, Lena establishes the Lena Luthor Foundation.
Samantha Arias / Reign Samantha "Sam" Arias/Reign (
Odette Annable; main: season 3; guest: season 5) is an unknowing Kryptonian survivor sent to Earth by a party of Kryptonian priestesses as an infant prior to its destruction. Sam was adopted by Patricia Arias. Although she grew up without knowledge of her origins, she is sensing that there is something unusual within herself and fears it. Samantha is also a single mother who struggles to raise her daughter Ruby, having distanced herself from her adoptive mother when she became pregnant with her daughter as a teenager. At one point, Sam demonstrated
superhuman strength that let her lift a fallen tower off of her daughter Ruby during a terrorist attack; but she believes her strength in the moment was merely derived from
adrenaline and the heightened emotion of distress, and she loses the extra strength immediately after. She works with Lena Luthor, and is promoted to be the acting CEO of L-Corp after Lena Luthor buys CatCo, and later becomes its CFO. She and her daughter also later befriend Alex and Kara Danvers. Throughout the season, Sam forms close friendships with Lena, Alex, and Kara. She finds out from her adoptive mother that she arrived on Earth in a space pod and thus she is an extraterrestrial in origin. Under the pod key's guidance, Sam travels to a desert that leads her to a hidden Fortress Of Solitude of her own, called the Fortress Of Sanctuary, where a hologram in the form of one of the dark priestesses, Selena, informs Sam of her heritage and that she is engineered as a "Worldkiller," a living biological weapon of enhanced Kryptonian physiology who was sent to rule Earth; her pregnancy kept her from coming into her powers. Sam was not willing to accept this, but her full powers manifested, awakening her dormant alternative personality
Reign. By the end of the season, it is revealed that Selena is Reign's birth mother, therefore is Sam's as well. After returning home, Sam remains a devoted mother to Ruby with no memories of her actions as Reign, while her Kryptonian alter-ego becomes a black-clad, masked vigilante who murders those she sees as evildoers. However, Reign and two other Worldkillers are each designed to have
dissociative identity to keep their existences hidden, yet Sam is stronger than Reign in willpower and control because of her devotion to Ruby, keeping Reign from fully taking over. During her first encounter with Kara's alter-ego Supergirl, Reign battles and defeats her, leaving the superheroine in a coma for days. After Supergirl emerges from her coma, Reign is at odds with her, the DEO, and the Legion. Reign learned that there are more Worldkillers on Earth and seeks to find them. She manages to get Purity on her side when she surrenders to Reign. Following the deaths of Purity and Pestilence, Reign absorbed their abilities and got away. Reign later targets Ruby to eliminate Sam's will for control, causing Supergirl and Alex Danvers to work in protecting her. Thanks to some Kryptonite, Supergirl, Mon-El, and Kara were able to incapacitate her enough to render her unconscious as they work to find a way to eliminate the Reign side of her. Later, using a mineral from Krypton called the Harun-El, which is a form of Black Kryptonite, they are able to split Sam from Reign. Sam joins the fight against Reign and the dark priestesses after being endowed with powers that match Reign's. In one timeline, Sam kills Reign, but at the cost of her own life and her allies, but Supergirl travels back in time, and changes the outcome of Reign's defeat and averted the deaths. In the reset timeline, though still defeating Reign by herself, because of another exposure to the Harun-El during the fight, Sam is rid of the Kryptonian side of her, therefore having no powers once more and a chance to again live a normal life with her daughter. In season four's premiere, it is mentioned that Sam and Ruby have relocated to Metropolis, where Sam is heading L-Corp's northeast sector. In season five, Mxyzptlk showed Kara some possible realities that Reign is in. The first one showed that Reign killed Lena Luthor and Mon-El before being taken down by Supergirl. A reality in which Supergirl and Lena didn't meet showed that Reign became one of Lena's enforcers.
Querl Dox / Brainiac 5 Querl Dox/Brainiac 5 (
Jesse Rath; main: seasons 4–6; recurring: season 3) is a
Coluan hero from the 31st century who arrives in National City to help Supergirl battle Reign. Rath was promoted to series regular for season four. In season five, Brainiac 5 helped to investigate Leviathan. Following the Crisis, Brainiac 5 encountered different doppelgangers of himself including a dead eyepatch-wearing Brainiac 5, an evil Brainiac 5 who bottled his Earth during the Crisis, a ponytail-sporting Brainiac 5 (all three also portrayed by Jesse Rath), and a female Brainiac 5 (voiced by
Meaghan Rath) who is the director of her DEO. The evil Brainiac 5 plans to open the bottle with the help of the witches and release his world in Al's Bar, not caring that this would destroy Earth-Prime. Brainy Prime removes his three personality inhibitors, assuming his true Coluan colors and powers. He promises the anguished Brainiac 5 that he will search for a safe way to open it someday. The three Kryptonian witches agree and join the evil Brainiac in his bottled world. The two remaining Brainiac 5 doppelgangers choose to give up their corporal forms and exist inside the Big Brain, the "Coluan knowledge aggregate." Before she leaves, the female Brainy warns Brainy Prime that he must give up everything and everyone and appear to work with Lex Luthor to stop the threat of Leviathan. After breaking up with Nia, Brainiac 5 visits Lex Luthor about Leviathan. He frees the alternate Winn and brings him to Lex. Outside of Winn, Alex finds out about Brainy working with Lex to uncover Leviathan and what his female counterpart said. When Alex resigns, Brainy becomes the new Director of the DEO. His work with Lex also strained his relationship with Dreamer. During the fight against Leviathan, Brainiac 5 enters their ship. Guided by the female Brainiac 5, he activates the code that disables Leviathan as he bottles up Rama Khan, Tezumak, and Sela. Owing to being weakened by the ship's defenses, Brainiac 5 has the bottle taken from him by Lex Luthor as Dreamer heads off to find Brainiac 5. In season six, Brainiac 5 is saved by Dreamer and explains to her why he had to push her away. It took Martian nanites to help Brainiac 5 recover. Near the end of the season, Brainiac 5 intended to return to his time and merge with the Big Brain, but was unable to go through with it due to his love for Nia.
Ben Lockwood / Agent Liberty Benjamin "Ben" Lockwood/Agent Liberty (
Sam Witwer; main: season 4; guest: season 5) is a former college professor who became an anti-aliens extremist after suffering a series of misfortunes, including the loss of his business, home, and father over the course several alien attacks. With the aid of Mercy and Otis Graves, secretly along with Lex Luthor from prison, Ben becomes a self-proclaimed "Agent of Liberty" and founds a human supremacist group called the
Children of Liberty to rid Earth of all alien life, including Supergirl. After winning a debate against Kara Danvers on national television, Ben is given his own weekly show named "The Lockdown" whilst secretly operating as the masked Agent Liberty. Ben and his organization go on to kill numerous aliens in National City, including Manchester Black's fiancée, Fiona Byrne. Ben subsequently comes to blows with a revenge-driven Manchester, who kidnaps Ben's wife Lydia and reveals her husband's alter-ego. Supergirl ultimately intervenes and apprehends them both. Ben is publicly exposed as the Children of Liberty's leader and taken into police custody. However, a large crowd of his supporters, including Lydia, protest Ben's imprisonment. Ben later enlists his son George to get involved with the Children of Liberty on his behalf. He is eventually pardoned by President Baker under the cause that the Children of Liberty's terrorism does not apply to humans, despite the Alien Amnesty Act. Baker later invites Ben to the White House, where he makes him the Director of Alien Affairs. With his new authority, Ben grows more dangerous in his agenda, including beating his underlings into submission. He begins using the president's martial law to round up all alien residents in the United States, intending on committing genocide. After Lydia is murdered in retaliation for his actions, Ben injects himself with Lena Luthor's experimental Harun-El serum and gains superhuman powers to avenge the death of his wife. However, his vendetta strains his relationship with George, who becomes disillusioned with his father. Ben later learns from Otis about Lex's plot to redeem himself by using and betraying the Children of Liberty and Kaznian invaders, causing Ben to kill Otis. Starting to fall ill from the experimental serum and no longer having any reason to his goals, Ben attempts to take revenge on Lex for manipulating him but is ultimately stopped by Kara, Alex Danvers and James Olsen. After a grueling battle, Ben and James simultaneously de-power one another. After Lex's plot is exposed, Baker is impeached and arrested while Ben is then imprisoned for his crimes of domestic terrorism. Ben watches from prison as his son begins speaking out for the cooperation of humans and aliens alike. In season five, Mxyzptlk showed Kara a possible reality where she revealed her secret to Lena from the start. Here, Ben started hating Supergirl after his family died in a misguided attempt to get her to save them. Ben and Otis abducted Lena and Thomas Coville to coerce Supergirl to reveal her identity. This works and Supergirl saves Lena and Thomas at the cost of the Children of Liberty targeting her loved ones.
Nia Nal / Dreamer Nia Nal (
Nicole Maines; seasons 4–6) is a transgender woman working at CatCo under Kara Danvers. She became part of the main cast for the fifth season. After Jimmy leaves CatCo, Kelly goes to work for Obsidian Tech and helps with the development of the Obsidian Platinum lenses. In season six, Kelly finds Andrea in sadness as her father blames her for what happened with the Unity Festival. Afterwards, Lena advises Alex to inform her on Supergirl's identity. Following the defeat of Lex Luthor and Nyxlygsptlnz, Alex and Kelly marry and adopt an alien girl, Esme.
Eve Teschmacher Eve Teschmacher, portrayed by
Andrea Brooks, is a thrall of
Leviathan who tasked her with working as
Lex Luthor's spy. Under the latter, she works undercover at CatCo as
Cat Grant's, later
James Olsen's, personal assistant and
L-Corp as
Lena Luthor's research assistant throughout the series. Following changes made to the multiverse during the events of "
Crisis on Infinite Earths", Teschmacher becomes an employee of Leviathan's front company Obsidian Tech who joined the organization as an assassin after her father was killed. Lex later found her and persuaded her to work for him in exchange for protecting her mother and claiming to know who killed her father. Though she later discovers Lex was lying, he blackmails her into continuing to aid him by threatening to harm her mother. After
Supergirl rescues Teschmacher's mother and Lex is arrested for his complicity with Leviathan, Teschmacher testifies against him, though he is later acquitted.
Mar Novu / Monitor Mar Novu / The Monitor (
LaMonica Garrett; main: season 5; guest: season 4) is a Multiversal being who tests different Earths in the multiverse in preparation for an impending "crisis", providing the Book of Destiny to John Deegan, releasing
J'onn J'onzz's
brother on Earth-38, and retrieving the corpse of
Lex Luthor.
Andrea Rojas / Acrata Andrea Rojas (
Julie Gonzalo as an adult, Alexa Najera as a teen; seasons 5–6) is the CEO of Obsidian Tech, an old friend of Lena Luthor, a former girlfriend of Russell Rogers, and the new editor-in-chief of Catco Worldwide Media who Kara Danvers and James Olsen dislike. At a young age, Andrea's father Bernardo was having trouble at Obsidian Tech and she enlists Lena to help search the local ruins for the Acrata medallion. When Andrea finds it, she is approached by a male elderly representative of
Leviathan who has her take the medallion so that Leviathan can use her services. When the female elderly representative Margot first appears to her, Andrea is told how to activate its abilities as she is sent to kill Governor Harper. Andrea persuades Margot to make use of Russel Rogers. While running Cat Co., Andrea is being investigated by William Dey and his
London Times colleagues, suspecting that she is head of an organized crime group. It is revealed that she has connections with Leviathan when Margot visited her stating that Rip Roar is in DEO custody. After the first attempt failed while also revealing to the viewers that she was the one who killed Caroline O'Connor, she turned to Lena for help. Lena provided a diversion for Supergirl so that Acrata can make off with Rip Roar. Acrata raids DEO HQ with the help of two Aurafacian-possessed humans. She is successful in this mission while the two Aurafacian-possessed humans were detained. After giving Lena the medallion, she witnesses Rip Roar getting sniped at the airport. The male elderly representative states that Leviathan still needs her services while Rip Roar has served his purpose. When Andrea states that Lena has the medallion, the male elderly representative states that her powers actually came from the darkness within her. Rama Khan later uses her in a plot to create a supervolcano in National City. This plot was thwarted by Supergirl and Martian Manhunter. Acrata teleports Rama Khan back to Leviathan's headquarters and flees. Following the Crisis where Earth-Prime is formed, Andrea is talking about Obsidian Tech's lenses when Gamemnae appears in her Gemma Cooper alias. Andrea shows her the lenses as she makes some suggestions about them. During a test on Obsidian Platinum, it failed when Andrea found it simulating an allergy to lobster. Gemma later visits her and advises her to have Obsidian Tech collaborate with LuthorCorp to get past the errors. Andrea never became an assassin for Leviathan on Earth-Prime, though she still has the Acrata medallion which was seen after Supergirl thwarted Amy Sapphire's revenge on her for firing her virtual reality-addicted husband. When Alex got trapped in virtual reality, Andrea had to walk Kelly through getting Alex out. Afterwards, Andrea spoke to her employee Eve Teschmacher into looking into the bug patches. When Kelly and William visited Andrea about Eve, Andrea states that Eve had a clean slate. She also informs Kelly that if she approaches her without evidence of Obsidian's tampering, she will fire her. When Supergirl enters the Unity Festival, Lex advises Gemma to send one of their assassins to attack Supergirl's physical body. Gemma goes to Andrea and reveals that she is part of Leviathan and was the one who rescued her from the cave. She has an assignment for Andrea in exchange that nothing bad happens to Obsidian Tech and her father. Becoming Acrata, she tracks down Supergirl's body and prepares to use the Kryptonite on her. Acrata is talked down by Lena. In season six, Kelly finds a saddened Andrea who states that her father has blamed her for what happened during the Unity Festival. Becoming Acrata, Andrea secretly visits Bernardo's home and buys her share of CatCo from him. Andrea announces this to the CatCo staff while also mentioning the news of Lex Luthor's arrest. When she as Acrata obtained Lex's journal about his love for Nyxlygsptlnz, she published it in William's name, which led to him being fatally shot by Lex in revenge. After speaking with Lena on if she was a monster, Acrata later assists the Super Friends in fighting Lex and Nyxlygsptlnz. Afterwards, Andrea establishes a journalism award and a foundation named after William. Cat Grant later bought back CatCo from her.
William Dey William Dey (
Staz Nair; seasons 5–6) is the new star reporter at Catco Worldwide Media. She saves her from Scar by claiming that the Phantoms and the White Martians are coming their way. While mentioning her history with Mister Mxyzptlk, Nyxly states that she was a princess who was banished to the Phantom Zone by her father King Brpxz who also killed her brother Bryxly. While having a bracelet that negates her abilities, Nyxly managed to sneak a 5th Dimensional Orb with her. To help Kara rescue Zor-El, Nyxly breaks her bracelets at the cost of her 5th Dimensional Orb. With her powers regained, Nyxly heals Kara's leg and helps to rescue Zor-El. When a mirror that would serve as one of the exits to the Phantom Zone is found, Kara discovered that Nyxly has her own plans with the mirror where she plans to go to Earth to return to the 5th Dimension and retaliate against her father. During the struggle, Kara accidentally sets off the self-destruct sequence and sacrifices the mirror to keep Nyxly from going through. Nyxly survived the building's explosion and secretly stows away on top of the Tower following Supergirl and Zor-El's rescue. After allowing Nia's mother to be revived for a day, Nyxly ran into the hunter Mitch and collaborated with him in a plot to trap Supergirl by having Dr. Desmond Raab build a cryo-bomb. When it was destroyed by Supergirl, it was revealed to have helped Nyxly regain her powers. Using her powers, Nyxly incapacitates Supergirl's legs in ice and destroys the Ormfell Building. With Supergirl vulnerable to magic, she calls for Mxyzptlk. Nyxly does different attacks to draw out Mxyzptlk until he surrenders to her. Nyxly then uses an orb to absorb Mxyzptlk where she uses the orb to find the totems she needs. After obtaining some of the Totems and being aided by an A.I. modeled after her that was placed in a Lexosuit she received, she is then visited by Lex Luthor who gave her the Lexosuit with the A.I. made from a future Nyxly. Lex aids her in hunting for the remaining totems. Though this becomes stained due to Lillian and their competition once the AllStone is put together and split into three pieces. When Lex Luthor opens a portal to the Phantom Zone to summon the Phantoms, Lex and Nyxly are dragged in by the Phantoms due to their hubris. ==Recurring characters==