The is led by
Sergeant Keroro. While most
platoons contain thirty or forty soldiers, the Keroro Platoon only has a meager five. Its full name is the . In the anime's English dub, the unit is referred to as the Advance Recon Mission Preparatory Invasion Terror Platoon (A.R.M.P.I.T.). Keroro refers to the acronym as being "unfortunate." The initial operation of the
Keroro Platoon was to stealthily survey Earth and relay information to the awaiting Keron Invasion Army. The five members were dispatched throughout Greater Tokyo and the surrounding areas to assess Earth's weakness and prepare for a total military takeover. Having infiltrated the Hinata house,
Sergeant Keroro concealed himself in one of the bedrooms, but was accidentally discovered by the Hinata children, a pair of middle-school siblings. Shocked by their ability to see him, he was overpowered, captured, and temporarily stripped of his weapon, the Kero Ball. With Keroro coming into direct contact with the Earthlings, the invading army lost their surprise element, deemed the campaign compromised, and immediately started withdrawal procedures from Earth's orbit. Abandoned by the army and without his platoon's support, Keroro must unite his scattered soldiers, survive his prisoner of war manual labor, and outwit his captors. He is eventually connected with his platoon and subsequently given revised orders to continue the invasion campaign but by themselves. They must now fulfill their new mission, protect their human friends, their home base, and the Earth from other alien invaders. The platoon's hierarchy in military rank is similar to the
Army ranks of the Japanese Empire during World War II and have based certain weapons, equipment, and terms after the Imperial Japanese Military, but remains faithful to the perception of the alien invader with higher technological achievements.
Keroro Voiced by: Kumiko Watanabe (Japanese);
Todd Haberkorn (English,
Funimation dub),
Chris Cason (English, Funimation dub; pilot voice), Andrea Kwan and Sarah Hauser (English,
Animax Asia dub),
Vic Mignogna (English,
ADV dub pilot,
Lucky Star appearance) is the leader of the Keroro Platoon, evidenced by the leadership star he wears on his belly. He has a green body and wears yellow, Imperial Japanese Army-style headgear with a red star in the middle, symbolizing that he is a leader. When the Keroro Platoon members happen to be caught in an explosion of some kind, they are seen with an afro. Keroro's black afro is most commonly seen. Keroro used to be a good officer, but since his arrival to Earth and the subsequent loss of his Keroball, he has lost most of his interest in the invasion, preferring to spend his time making
Gundam models, watching anime (especially the
Space Captain Geroro series, a parody of
Space Battleship Yamato), or reading manga. Keroro has lived with the Hinata family in their house since arriving to Earth and often does their house chores. Although Keroro is seen as weak and lazy by nature since he started living with the Hinatas, he is actually the most powerful and dangerous member of the platoon, becoming severely weakened due to Earth's atmosphere having significantly less moisture than back on Keron. This lack of humidity apparently weakens all Keronians, though Keroro appears to be the only member of the platoon to be significantly affected by this. Occasionally, specifically, when there is a lot of moisture in the air, Keroro reverts to his previous self, a cold and ruthless soldier with enhanced strength, speed, and the ability to shoot powerful energy blasts from his hands. Though moisture returns him to full power, being exposed to it for too long turns Keroro into a crazed lunatic, causing him to attack everyone and anything in sight. Keroro becomes virtually unstoppable in this state and can easily overpower anyone who tries to stop him, including the members of his platoon and even Natsumi. This usually ends with a Nyororo, a creature that ventures throughout space that seeks out high moisture levels to feed itself, sucking off all of Keroro's moisture. Keroro is carefree, ignorant, greedy, selfish, vengeful, unlucky, egotistical, smug, and cowardly (especially against Natsumi), with a short attention span for anything not related to Gundam models. However, he occasionally displays bouts of unselfishness and bravery. He misspends the invasion budget on models, and he always leaves the paperwork for their bosses back in Keron for the last possible moment, often punished for it. The son of an infamous war hero, the Demon Sergeant, Keroro, spent his childhood being raised by his father and was often punished for acting girly or lazy. Keroro's rise through the ranks was partially due to his father's influence within the military, allowing Keroro to do whatever job he wanted. He is childhood friends with platoon members Giroro and Dororo and is responsible for most of the latter's traumas. In some of the movies and other episodes, it is shown that he's good at convincing people. Keroro's invasion plans often hide personal goals like getting back at Natsumi, raise or to improve his Gundam collection, or even preventing the Earth from being destroyed or conquered by other alien species. Even when they do not, they are often harebrained ideas without a chance of success. His plans also consist of how to distract humans while Keroro invades the Earth. He's raising money plans usually follow the same pattern and often involve Momoka hiring them for some crazy goal of her own. The few strategies that have a chance of success usually fail due to setbacks, Fuyuki's friendship appeals, or because another character points out that if Earth is destroyed, it would mean no more Gundam models.
Giroro Voiced by: Jouji Nakata (Japanese),
Akiko Hiramatsu (Japanese, child);
Christopher Sabat (English, Funimation dub), Scott Evans (English, Animax Asia) is the Platoon's highly aggressive weapons expert. His body is dark red, while his headgear is dark maroon with a skull in the middle. He is the only member of the platoon who doesn't wear a symbol on his belly. Instead, he wears a belt with a rectangular buckle diagonally across his body. However, when he was a tadpole, he had a skull symbol on his belly. His Afro, which is rarely seen, is blond. Giroro is the only member of the platoon who takes the invasion of Earth seriously and is often frustrated by the lack of progress made towards accomplishing this mission. Due to Keroro's negligence in his duties as commanding officer, Giriro often acts as the disciplinarian in the platoon, keeping Keroro from ignoring his duties when the later forgets to submit his invasion reports to HQ or is caught spending their invasion budget on schemes that often put them in the red. Despite this, he will follow Keroro's orders, whether or not they make sense as he still holds respect for the chain of command. Giroro once had respect for Keroro as an officer before their mission to Earth and, at one point, attempted to restore Keroro to his former self. However, he soon came to regret it as Keroro had become too powerful for anyone to control. Though Kururu outranks him, Giroro acts as the de facto second in command after Keroro due to Kururu's volatile personality and laziness. Giroro had displayed outstanding leadership skills at times of crisis and has taken charge of the platoon on more than one occasion when the situation called for it, mostly on combat missions. Giroro is in love with Natsumi Hinata, something everyone but Natsumi seems to know since she defeated all his traps he set when he arrived at the Hinata house. He attacks anyone who seeks to harm her, even his platoon members. Giroro views Mutsumi Saburo as a robust romantic rival and will do whatever it takes to keep him from getting close to Natsumi even though she is in love with Saburo. Despite being the most dedicated to the invasion of Earth, Giroro's romantic obsession with Natsumi has caused him to abandon his duties on more than one occasion which often end up with Giroro unintentionally botching Keroro's plans of the invasion when they put Natsumi in danger. Ever since his first encounter with the Hinatas, Giroro has been living in a tent in their backyard, where he roasts sweet potatoes he sometimes shares with Natsumi and obsessively cleans his weapons. The buckle of his belt hides his treasure, a photo of Natsumi. He shares his tent with a whitish-pink female cat he rescued from the rain and named "Miss Furbottom." Unknown to him, Miss Furbottom is in love with Giroro. Giroro has a short temper. He is often irritated by the laid-back and unfocused attitude towards the invasion of the other members of the Platoon, specially Keroro. He appears to be gruff, but he is an honorable frog with a good heart. He lacks any other hobby apart from his weapons. He is terrified of ghosts and
sea cucumbers. He cannot drink more than a drop of alcohol without passing out. Despite being dedicated to the call of duty, Giroro is often used as comic relief. He is often crushed by something dropped from Natsumi's window or a falling object from space, usually containing an alien of some sort (or Karara). Other times he reluctantly volunteers himself to test Kururu's inventions at Keroro's request in the pursuit of money, which most times leave him injured. His romantic dilemma with Natsumi leaves him clumsy and blundering. His feelings toward her are often used by other characters to get him to agree to something, saying that she will like it.
Tamama Voiced by: Etsuko Kozakura (Japanese);
Brina Palencia (English, Funimation dub) is ranked
Private Second Class in the Keron Army's
Keroro Platoon. He is the newest member in the planetary invasion troop and the youngest, still having his tadpole tail and white face. Tamama has a dark blue body with yellow headgear and big round eyes. He wears a green and yellow mark on his head and belly, which matches the
Shoshinsha mark that new drivers in Japan must display their cars for one year after obtaining their licenses. His Afro is a reddish-brown. While usually seen as cute, gentle and cheerful due to his youthful appearance, Tamama becomes an insane, raving maniac when feeling overly excited, angry, or jealous. These negative feelings power his energy beam. Tamama idolizes and has strong feelings towards Keroro, though the latter seems unaware of them. He is usually the first to support Keroro and his plans, no matter how ridiculous they can be. Though he is loyal to Keroro, Tamama's loyalty to him has become shaken when Keroro becomes emotionally abusive or overly lazy, having abandoned his commander on more than one occasion. Tamama is very close friends with Momoka due to their similar personalities and lives with her in the Nishizawa Estate, much to his Platoon's jealousy. While living with Momoka, Tamama openly enjoys luxury and is very knowledgeable of Momoka's family wealth because of it. Though they got off on the wrong foot, both Tamama and Momoka are very loyal to one another to the point where Tamama will openly go against Keroro if the latter's plans interfere with Momoka's plans to win Fuyuki's heart. He hates Mois because of Keroro's feelings and trains hard until he defeats her and gains Keroro's affection. However, sometimes he is ashamed of his evilness when faced with Mois's pure heart. He relies on pure energy in battle, shooting his powerful attack, Tamama Impact (earlier referred to as Tamama crazy breath), a yellow energy beam from his mouth. He's often seen training, usually beating up a piece of wood with a sloppy drawing of Mois. Tamama loves snacks and sweets; living with the ultra-rich Momoka means he has as many as he wants.
Kururu Voiced by: Takehito Koyasu (Japanese);
Chuck Huber (English, Funimation dub), Todd Haberkorn (English, Funimation, pilot dub) , localized as
Kululu in Funimation's English anime dub, is the resident genius in the Keroro Platoon serving as their Tactical Communications Chief. His body is yellow, with orange headgear that includes two headphone-like white pieces over his ears. His forehead and belly mark is a filled spiral. He wears glasses with spirals on them. Kururu was blue when he was little, but at the end of the short movie
Secret of the Kero Ball, he became yellow due to being stuck in a colossal curry plate that Keroro made for him from the Kero Ball. Although he is the highest-ranking officer in the platoon, he is not the leader due to his unpleasant and threatening demeanor, which has given him the nickname of "Yellow Devil". Kururu is enigmatic, deceitful, lazy, sadistic, and has a habit of snickering (with a characteristic "Ku Ku Ku" sound) at the beginning and ending of sentences. Like Keroro, Kururu appears to have little to no interest in conquering the planet, though his disinterest in accomplishing this mission is more out of sheer laziness. Unlike the rest of the platoon who specialize in combat, Kururu's expertise lies in his high-level technological prowess, including hacking and inventing; he has designed and created most of the gadgets and weapons used by the platoon. Many of his inventions that he builds at Keroro's request often end up backfiring. It is heavily implied that Kururu intentionally does this due to his low respect for Keroro's plans and the pleasure it gives him to watch Keroro fail. He is generally disliked, most of the characters seeing him as a disagreeable prankster. Kururu cares very little of what people think of him and often ignores others attempts to set him straight, being able to ignore just about anyone who tries to talk any sense into him except for Mois, who once inadvertently got him to stop a sadistic string of pranks by simply looking at him with a sad face. Despite his unfriendly personality, Kururu surprisingly becomes cooperative whenever Keroro develops an invasion plan whether or not it involves a personal agenda, often building whatever Keroro requests with little to no reservations despite intentionally sabotaging most of these plans himself. In the series, action figures tend to sell very poorly on Keron, but Kururu seems to take pride in his bad attitude. Whenever something bad happens to another character or is blamed for doing something, he laughs in a medium- to a high-pitched voice saying "Kekekekekekekeke." Despite his attitude, he gets along quite well with Mutsumi, his human friend, and Aki Hinata, with whom he has a stalkerish crush. Kururu and Giroro greatly loathe each other due to their vast differences (brain vs. brawn). As a result, Kururu usually uses Giroro as a guinea pig for any invention that he creates. His name comes from the Japanese word for the phrase "round and round" ("kuru kuru"), referring to the spirals seen on his glasses.
Dororo Voiced by: Takeshi Kusao (Japanese);
J. Michael Tatum (English, Funimation dub), David Lee McKinney (English, Animax Asia dub) is the last of the platoon to appear. His body is medium blue (although painted completely black in the manga) with light gray ninja-like headgear and mouthpiece. His forehead and belly mark are four-pointed
shuriken, and he always carries a sheathed knife on the back. His pink Afro is the one seen more rarely. Then known as , he graduated from the Keron Military Academy under the rank of Lance Corporal. After serving alongside Zoruru in an elite assassin squad, under the command of Captain Jirara, he was assigned as the assassin of the Keroro Platoon alongside Keroro, Giroro, Tamama, and Kururu. They were given the mission to conquer Pekopon. After a crash landing on Pekopon, Zeroro was rescued by ninja-in-training Koyuki Azumaya (in the anime, he was rescued by Koyuki and her dog Zeroyasha). Wishing to follow the way of the ninja, Zeroro changed his name to Dororo. His reunion with the rest of the platoon does not start well since he resigns because he no longer shares their invasion objectives and wishes to embrace his new life as a ninja on earth. He tells Koyuki that life with her and the peacefulness of earth brought him a new life perspective. However, after he and Koyuki are captured by Viper and the platoon comes to rescue them, they mend their friendship after Keroro tells him that he broke his music box and that he wishes their friendship can be mended. He eventually rejoins the platoon after making them steam a bit. In the manga, he and Koyuki move to a house beside the Hinatas,
Garuru Platoon Garuru Voiced by: Akio Otsuka (Japanese) is a Keronian S-rank sniper, a first lieutenant of the Keron Army, and the leader of the Garuru Platoon. The Keron Army sent the Garuru Platoon to replace the
Keroro Platoon to conquer Pekopon, in episodes 101–103. Garuru defeated his younger brother Giroro in a one-on-one gun match but was later defeated in a rematch. Thanks to the Keroro Platoon's friendship and united power, the Garuru Platoon was defeated. Garuru is known for being powerful, no-nonsense in battle, and intimidating.
Taruru Voiced by: Akeno Watanabe (Japanese); Chris Cason (English, Funimation dub) but was defeated by a persevering Tamama. Taruru is light blue with gray headgear and wears the
Koreisha mark on belly and forehead.
Tororo Voiced by: Kappei Yamaguchi (Japanese) Unlike most Keronians, he has two body colors, purple and green. His symbol is a blue circle with squares on the sides and three small black rectangles pointing upwards. When he was young, he was a friend of Pururu, who was kind to him when he was hurt and put a star-shaped plaster on him. Due to this, he has a crush on Pururu. However, Keroro ripped the plaster off him. Pururu punished him, but Shirara was upset and vowed revenge. When he found a special gold and silver helmet called the Keromet, he put it on and was powered up. He changed his name to Shurara, formed the Shurara Corps, and decided to get Keroro's Keron Star. The helmet, though, was a planet eater, eventually expanding to huge sizes and absorbing Sharara, which caused Shurara to destroy it. After this, he became Shirara again and returned to Keron with Pururu.
Putata Voiced by: Kentaro Tone (Japanese) is a skilled artist working for the Shurara Corps, using the title of . Putata is a naturally yellow Keronian, though he has painted spots on his body, like around his left eye, where he is orange. Putata's symbol on his stomach and forehead is in the shape of a light blue shuriken. His paintbrush and cap-like helmet with blue-tipped bolts on top are made out of mostly silver-colored metal. Putata's paintbrush is also a weapon that enables him to bring his paintings to life, though it has a limited amount of usable ink. It can transform into a Nyororo paintbrush that Putata uses to suck Keronians up and use the liquid as ingredients for ink. Keroro destroyed the paintbrush by holding some hot curry as he was sucked. In his introduction, Putata was seen vandalizing the residence and property of the Hinata family. The Keroro Platoon, by that time, did not know that he was a part of the Shurara Corps. Putata is the most energetic, lively, and vivid of the Shurara Corps. He is rarely moved to tears. Putata is very agile, which allows him to paint quickly.
Mekeke Voiced by: Chō (Japanese) is Putata's partner. He is introduced as the Enigmatic Puppet — using Keronian — and is also referred to as Super Marionette Mekeke. He can take control of whomever he attaches his strings to. He is a teal Keronian with gold eyes. When exposed to paint, Mekeke appears to wear a crossed eyepatch, a large, sleeveless shirt, and floppy ears. His symbol is a blue circle with a medical cross. His puppet has large, blond sideburns, a crossed eyepatch, eye cross, four arms equipped with blades, and a puppeteer cross. Mekeke has amazing stealth and ability, though his puppet strings are easily broken. His puppet uses its puppeteer cross to levitate. This is a parody of
Kankuro and
Sasori's Crow from
Naruto. When fully exposed to non-solid substances, his invisibility is cancelled out.
Giruru Voiced by: Kunihiko Yasui (Japanese) is a mutant Keronian of pure blue slime. Being made of liquid, he can manipulate the shape of his body. He has the ability to turn others into puddles. He has large yellow eyes that lack pupils. His symbol is a small yellow drop. His weakness is a powder, especially oil hardener since he solidifies on contact. In the anime, Giruru's name was changed from Geruru in the
Keroro Land magazine.
Dokuku Voiced by: Takeshi Kusao (Japanese) is Giruru's younger brother, who was turned into white gas form in an experiment. He lacks legs and has a scarlet tipped ghost-like tail. His left eye is scarred, and his right is blue and lacks pupils. He has fire red sideburns. His symbol is a large white drop with a demonic outlook. His left hand is a scythe blade, and has two levitating red flames that follow him. Being gas, Dokuku can levitate and phase through cracks and holes. He can use his scythe hand as a weapon as well as the fireball. He can possess people by going up against their bottoms. His primary objective was seemingly to free Giruru from the Keroro Platoon. He tells Giruru that he is quitting the Shurara Corps because he is not being paid enough.
Kagege Voiced by: Toshio Furukawa (Japanese) The assassin of the Shurara Corps. is a white Keronian with blue and purple flames, an old tadpole who wears a dark blue scarf. His left and only eye has a blue cross and glows, leading to his eventual defeat in the Keroro Platoon's darkness. His shadow is shaped like large blue flames with his missing right blue eye with a white cross. His symbol is a blue downward point with two curved spikes on the left side.
Nuii Voiced by: Kurumi Mamiya (Japanese) Originally an abandoned stitched up orange Keronian doll resembling a tadpole, was brought to life by Shurara and was made a member of the Shurara Corps with the title of . Her pupils are large buttons, and she has rosy cheeks. Her symbol is a yellow button with a cross at the center that lies on her forehead, stomach, shoulders, and hat flaps. She can turn an enemy into a doll with needles shot out of her arm. She comes to Earth and assumes the identity of Ku-chan, Natsumi's old abandoned teddy bear. After she is discovered, she is taken into the Hinata Household, where she loves and treats Nuii like a regular doll. Under the instruction of her superior, Gyororo, Nuii starts turning the Keroro Platoon and
Fuyuki into dolls. When Gyororo urges Nuii to turn Natsumi into a doll, the memories of the time she and Natsumi had spent together make her hesitate and turn on Gyororo. Nuii can hold Gyororo still long enough for Keroro to capture him in a bubble. Afterward, Nuii turns everyone back to normal and flies back to Planet Keron, searching for her former owner.
Gyororo Voiced by: Hiromi Hirata (Japanese) spies on the Keroro Platoon and reports their findings to Shurara. Gyororo ordered Nuii, once their comrade, to turn the Keroro Platoon and Fuyuki into dolls. However, when ordered to attack Natsumi, Nuii disobeyed and restrained Gyororo long enough for Keroro to trap them inside a bubble. They became a prisoner of the Keroro Platoon. They are a purple-blue and green tadpole Keronian with multiple eyes covering their body, hat, and the tip of their prehensile tail. They have a crazed smile full of sharp teeth, and their irises are red. They can merge and blend in with their surroundings, though one of their eyes is always visible. They can shoot lasers from their eyes. Gyororo has never canonically been referred to by any male or female pronouns. Thus they have no gender until their creator confirms it.
Robobo Voiced by: Keiichi Sonobe (Japanese) is programmed to steal the Keron star from Keroro. In episode 185, Robobo turned everyone into an electrical appliance to make them helpless. Dororo defeated him, but Robobo returned, so the platoon had to use the Grand Keron to defeat him. Robobo has square-shaped glass eyes. His symbol is a white circle with a smaller black circle inside it. He wears a skull cap with
headphones. His hands and feet are magnets. His larger form has two drills instead of magnets for hands. He has the power to fuse an entire city population with a nearby mechanical object. He can fly using built-in jets.
Yukiki Voiced by: Eiji Maruyama (Japanese) is an adult snowman Keronian, introduced as Yukiki of the
Mount Daisetsu Wind. He has a carrot for a nose and wears red mittens and a red bucket for a hat with a blue scarf under it to make ear flaps. The symbol on his light blue stomach is a silhouette of a two-tiered snowman with eyes. He can disguise himself as a snowman by pulling in his arms and legs. He can form a swirling Arctic wind, creating a block of ice from which he materializes himself. He can freeze items, making them useless.
Keroro Land characters Keroro Land Allies In the spin-off series in
Keroro Land, Keroro created an alliance to fight against the Black Stars. This alliance included: Toriri (bird-like), Saruru (monkey-like), Inunu (dog-like), Aruru (a nurse), Mukaka, Tsunene (fox-like), Tanunu (tanuki-like), Honolulu (a golem), and Garnier (a sand granite Keronian).
Black Stars A fictional team
Keroro Land consists of four deadly daredevil Keronians bent on conquering Keron: Mahaha, who specializes in cycling, Merara who specializes in hoverboarding, Megaga, and Melaka.
Firuru appears in the
Sgt. Frog spin-off magazine
Keroro Land. Figure (sometimes written as Filulu or Fielulu) is a sports doctor and the leader of Team Sporty in the Keroro Land magazine. This team, consisting of Piroro, Metoto, Jesus, Pokaka, and Oyoyo, was assembled to fight against the Black Stars, a group of four evil Keronians. Other teams were led by
Keroro, Giroro,
Zeroro (Dororo, while back on Keron), and Zorro.
Keroro Platoon's Family Keroro's father ("the Demon Sergeant") Voiced by: Kenichi Ogata (Japanese); Greg Dulcie (English, Funimation dub) He carries a bug-catching net and a pouch as well as a green bucket on top of his head that he keeps bugs in.
Kiruru. was born from Mirara being sealed away with the real Kiruru, making him the Kiruru sealed away in the Invasion Timer. He is a tadpole version of his counterpart/father, Kiruru but with a dot over the X mark. He is an incomplete version of Kirara. Instead of absorbing the power of negative thoughts, this Kiruru absorbed the power of hesitation. He was released from the Invasion Timer and befriended the
Keroro Platoon. But later, a Keron vessel released swarms of black Kirurus (AKA Kiruru X-52). After Black Kirurus took over, the black Kirurus gave X marks to
Natsumi, Tamama, and
Dororo that turned them evil, while Kirara. Gave triangles to the others. He then takes control of the ship base that controlled the black Kirurus by using the power of hesitation massively produced by Keroro and caused them to disappear. Then he turned everyone else back to normal. Kirara left with the memory of his friends.
Urere Voiced by: Toshihiko Seki (Japanese) is a highly ranked Keronian soldier who once assisted the Keroro Platoon in conquering Earth. It is purple. His helmet has headphones with a microphone attached. His symbol is an exclamation point, but the one on his chest is rendered upside-down, resembling a tie. He rarely blinks.
Robobo Fukusocho Robobo Fukusocho is a robot substitute for Kururu. He was made from silver metal. He has rectangle-shaped magnet feet and has crescent magnets for hands. His symbol is a black dot with golden tracings.
Rirara is a Keronian kunoichi. She is yellow. She wields a
shuriken with a string through it and a summoning scroll. Her helmet has two ribbons. Her symbol is a crescent moon.
Gitata is a Keronian guitarist. It is yellow. He plays an electric guitar. He has a mustache in the shape of lightning bolts. His symbol is a red guitar pick.
Gururu is a green cowboy Keronian. He has a rope tied from his shoulder to his waist. He wears boots and a hat. His symbol is a Texan star.
Gororo is a yellow criminalized Keronian. He has yellow and black sideburns. He has a lightning bolt across his chest and eyes. He commonly holds sticks of dynamite and panels of electricity. His symbol is a lightning bolt.
Eruru is an orange intelligent female Keronian. She wears glasses and a barrette and commonly carries a pen and notebook. Her symbol is an upward rectangle with a triangle on top.
Captain Jirara Captain was the leader of the assassin squad that Dororo (then Zeroro) and Zoruru used to be in. His mastery of Keronian Assassin Magic is unparalleled. He went rogue and fled to Earth, seeking out Dororo for one final duel. He is outfitted in a top-to-toe black suit, with armored blade-arms like Zoruru, an assassin mouthpiece (minus the breathing valve in Dororo's old mouthpiece), and a mask with three glowing red eyes and a shuriken over his left eye. His symbol is a shuriken with diamond blades. Jirara's name is from
Jiraiya.
Sababa settled on Earth during the golden age of Egypt, opening the possibility that the Great Pyramids were created through Keronian technology. Having evolved into a sand-based form after hundreds of years, Sababa has lost the ability to communicate in any coherent language, uttering 'sabarabara' at random, which leads Keroro to dub him Sababa. He wears an old and worn headgear, kohl around his eyes, and a pharaoh hook in place of his right hand. His symbol resembles two triangles end-to-end, the lower one twice as large as the upper, which is decorated with two eyes (a possible reference to the familiar eye-on-a-pyramid symbol on the US dollar bill.) The name Sababa comes from
sabaku, meaning desert.
Meruru is a member of Keron's official postal service, who comes to Earth to deliver a message for Keroro, which he tries to avoid receiving, thinking that it is a message from headquarters (but turns out to be a letter from Shipepe, Keroro, Giroro and Dororo's long time friend). Meruru is dedicated to her job to the point that she maneuvers her way around all of the platoon's attempts to detain her, including cloaking devices, guns loaded with capsules of sticky gunk, evasive driving, and Tamama's farting (which Meruru isn't slightly bothered by and possibly likes). Meruru's symbol is an envelope.
Kikaka is an artificially made Keronian which befriended Zeroro/Dororo and soon after Keroro, Giroro & Pururu during their childhood and having a few adventures with them, such as scaring away some bullies. The bullies then mistake Kikaka for the escaped biotech weapon that the army's been searching for and plan to turn him in until the real weapon (a more modern Kiruru) shows itself and Kikaka wards it off. Unfortunately, Kikaka then transforms into its true form, a simple doll (it is hinted that Kikaka was one of the first few tests of a much younger Kururu's Nanola)
Officer Bariri Voiced by: Ken Narita (Japanese) has a crush on Pururu. He tends to describe his emotions through fruit.
Black Star Black Star is the main villain of the manga volume 23. His history is unknown, though it is suspected that he is the first attempt to make that Shin Keroro failed. Black Star resembles Shin Keroro except he's mostly black, two ear-like appendages on his head instead of wearing a cap, wearing blue rings all over his body (his appendages, wrists, and neck as his collar). His eyes are colored blood red with black-lined rings around his pupil, his symbol is a black star (hence his name), and it is upside down, as opposed to Shin Keroro's Keron Star.
Nobibi Voiced by: Hidekatsu Shibata (Japanese) is Kiko Katoyama's Keronian friend. He is spoiled and quick-tempered towards the Keroro Platoon, but playful and kind towards Kiko. Nobili has a younger sister, Hanna.
Hanana is Nobibi's younger sister. She is a kind-hearted flower, Keronian. She is a pink Keronian. She has a point above her mouth. She wears a large blue and orange flower on her helmet. Her tadpole tail is a leaf. Her symbol is a flower bud. She has a one-sided love for Guru. Her name comes from the Japanese word
Hana, which means
Flower. ==Earthlings/Pekoponians==