; : :Kazuki is the main character of the series: a shy, quiet and awkward everyman, who possesses incredible fighting power and illogical charisma. As such, he attracts a bevy of beautiful women. Kazuki is regarded as a pariah by his classmates because he periodically has visions of giant robots battling in the city. After being accidentally sent to the parallel world by Ken and Mitsuki Sanada, Kazuki discovers that he is the only male that can control the mechas. Because of his unbelievable piloting skill, he is commissioned to the
Earth Defense Force, or simply the EDF, and becomes the new pilot of the white
Core Robot. His cover story at school is that he is Mitsuki's little brother, which gives Kazuki quite a bit of trouble. :Curiously, there is no alternative version of Kazuki Yotsuga in this world. Later in the series, Kazuki subconsciously awakens one of the original alien mechas, a robot named
Zinv. It is revealed that Zinv is Kazuki's counterpart in the parallel world. :When Zinv is destroyed, Kazuki's desire for the group to stay together results in the creation of a third possible world, where elements from the parallel universes are combined. ; : :Mitsuki is the most admired girl in Kazuki's school; young men constantly send her gifts and cards, and Kazuki is nearly lynched for speaking to her. She lures Kazuki to her house for her father's experiments, and later follows him into the parallel world (for some reason arriving a month before he does). She is the daughter of both Ken Sanada and Ayuko Sanada in this world; however, she is in no way related to the Ken Sanada from the parallel world. :Mitsuki is also an exceptional robot pilot, and joins the EDF to end the war, hoping research to send her home can begin afterwards. Unfortunately, Mitsuki is hotheaded and easily manipulated, and is captured by the
Rara Army towards the end of the series and coerced into piloting the complete version of
HIMC. :She clearly has an attraction to Kazuki, but covers it up by treating him abrasively. When Kazuki is lost behind enemy lines, Mitsuki is affected most of all. ; : :D is a
bioroid, an artificially constructed biological/mechanical being first introduced in the
Tenchi Muyo! universe. The war between the Earth Defense Force and the Rara Army began when D and at least two mechas were discovered in an artifact of unknown origin. Her original body was damaged, so a bioroid was built to contain her essence (represented by a glowing orb in place of an eye) while her body healed. :D appears to be as inhuman as the robot she pilots, speaking mechanically and asking many questions about human emotions and behavior. The only one to break through her stony exterior is Kazuki, to the shock of Commander Sanada and Mitsuki. D frequently has visions of a horrible creature attacking, and is deathly afraid of HIMC. :She develops a strong attachment to Kazuki, culminating in her decision to return to her real body at the climax of the series in order to save him, at which she came to the realization that she was in love with Kazuki, a new feeling she had not experienced or understood before. It is then revealed that D stole Zinv and fled her world to escape HIMC and
Kumu, who claimed the lives of her friends. :As a robot pilot, D is subpar, often requiring rescue by Kazuki and Mitsuki. However, she redeems herself by removing the limiter placed upon Zinv, allowing its true power to manifest itself. :When Zinv is destroyed and the worlds merge, D becomes Dee Sanada, taking on the animated personality of a young girl. :There is also an apparent resemblance between D and
Tenchi Muyo! GXP character Neju na Melmas, leading some to believe that she and D may belong to the same race. The character of D also resembles the character Doll from
Tenchi Muyo! War on Geminar. D will appear in the
Tenchi Muyo! GXP OVA sequel
Tenchi Muyo! GXP Paradise Shidō-hen. ; : :Yayoi is the original pilot of the white Core Robot, which Kazuki named "Hartzenen". After suffering a serious head injury in battle, Yayoi experienced a feedback loop, effectively cutting off her connection to robots and ending her career as a pilot. Kazuki climbed into Hartzenen and took control, saving Yayoi's life. She refers to Kazuki as "her prince", and falls in love with him. :Yayoi goes to great lengths to spend time with Kazuki, signing up to be his combat instructor and school homeroom teacher, and even moving in next door to the Sanada home and building a passageway and door into Kazuki's room (immediately boarded up by Mitsuki). Her grandmother once tried to arrange a marriage for Yayoi to another man (due in part to Mitsuki Sanada's meddling), but her affection for Kazuki was too deep for her to even pay attention to the would-be suitor. :When Zinv is destroyed and the worlds merge, Yayoi is Kazuki's homeroom teacher, still living next door and usually entering the Sanada house through Kazuki's window (as a short cut), to Mitsuki (Sanada)'s annoyance. ; : :The Earth Defense Force knows her as "Miss Ra", the Rara Army's spokeswoman/mascot, but when Kazuki is injured and trapped behind enemy lines, it is revealed that she is Mitsuki Sanada's counterpart in the parallel world, the daughter of Hiroshi Rara and Ayuko Rara. :Mitsuki Rara could very well be Mitsuki Sanada's direct opposite. She is quiet, easily embarrassed and gentle; she personally nurses Kazuki back to health. However, she places herself in a
trance to play Miss Ra, becoming a ruthless warrior. When she finds out that Kazuki is an enemy pilot, she launches him away in an escape pod, remembering the time he could have killed Miss Ra, but saved her instead. :Mitsuki is later
brainwashed into piloting HIMC, one of the most powerful robots created. After Kazuki saves her, she resists returning home, eventually becoming a Core Robot pilot for the EDF. She comes the closest to capturing Kazuki's heart; the two almost go out on a date, which is unfortunately cancelled by U.N. officers intent on sending her home. :When Zinv is destroyed and the worlds merge, Mitsuki lives with her parents right next door to the Sanada home, but has a habit of sneaking in Kazuki's window via sleepwalking and spending most of her time in the Sanada home. ; : :Ken has A and B versions: the eccentric scientist from our world, and the parallel world's commander of the Earth Defense Force. Ken is Mitsuki's father in this world, but is childless in the other world; naturally, he is quite confused when our world's Mitsuki calls him "Dad". :Both Kens share a love for instant
ramen, a slightly off-color sense of humor, and an understanding that Kazuki is special. Despite appearing to goof off on the job (antagonizing Rara and Akane never gets old), Commander Sanada takes it quite seriously. When the U.N. turns against the EDF, his subordinates remain loyal to him, proving his worth as a leader. :When Zinv is destroyed and the worlds merge, Ken Sanada returns to being a scientist as well as being married to Akane Yamano. In the new world, Mitsuki Sanada is his daughter and Dee Sanada is his adopted daughter. His relation to Kazuki is cause for question. Kazuki calls him "Uncle" but it is debated among fans whether they are actually related in the new world. ; : :The Earth Defense Force's United Nations advisor. Despite Akane's tendency to work "by the book", Ken and the young pilots often convince her to defy her orders, such as Rara's demand for the EDF to repatriate his daughter. When the EDF is outlawed, she resigns her post and flees with Ken Sanada and the others. :When Zinv is destroyed and the worlds merge, Akane becomes Ken's wife, as well as (unfortunately) Ayuko Rara's junior (as Ayuko was married to Ken previously), enabling Ayuko to insist on Akane's calling her "big sister". ; : :The grandmother of Yayoi Schwael, she exists only in the alternate world. She is a woman of some mystery, working for the EDF in some unknown (possibly classified) capacity but also acting as a
matchmaker for eligible young ladies with a success rate of almost 100% (Yayoi is one of the very few that escapes one of her grandmother's matches, thanks to Kazuki and a Rara attack during the marriage interview). She embraces traditional values and is a woman of strong character and moral judgement, as demonstrated when she scolds Akane for allowing people to laugh at Kazuki when he is forced to wear a female disguise. She also cares very deeply for people and is revealed in the OVA to be a dog lover. ; : :In our world, Rara is a
Nobel Prize-winning scientist (previously in competition with Ken Sanada for that honor). In the parallel world, he is become something of a megalomaniac. It was he who began the war in the first place, transforming himself into a messiah-like figure ("You fools have no fear of God!", "the divine power of the Rara Army"). :In the bizarre scene where Kazuki actually has dinner with the Rara family, the General reveals a softer side of himself; he believes that the war is about keeping the alien technology out of the wrong hands. However, it quickly becomes clear that Rara is simply a figurehead, with his wife wielding the real power. He redeems himself, however, when Kazuki attacks their base, and gets everyone out before it gets destroyed. :When Zinv is destroyed and the worlds merge, Rara and his wife move in next door to the Sanadas, hoping to corral Kazuki into revealing the secret of his connection to Zinv (one method being to get Kazuki into a situation where he would have to marry Mitsuki Rara). ; : :Ayuko was both Rara and Sanada's wife in the two worlds, and is the mother of both Mitsukis. In the parallel world, she manipulates events while behind the scenes, posing as Rara's submissive wife. In reality, she controls the Rara Army along with the mysterious alien named Kumu. She exploits Mitsuki Sanada's love of Kazuki to convince Mitsuki to turn against the EDF. Ultimately, both Ayuko and HIMC are defeated by Kazuki and Zinv. :When Zinv is destroyed and the worlds merge, Ayuko attempts to "arrange" Kazuki's marriage to her daughter, with humorous results. ; , , :Mitsuki Rara's best friends. While initially teasing Mitsuki for her attraction to Kazuki, they help him escape the Rara base when his identity is revealed. Later, they give Kazuki her diary after a battle, letting him know Mitsuki's still thinking about him. The three later join Mitsuki Rara as pilots for the EDF. :When Zinv is destroyed and the worlds merge, Alice, Mena and Ryla return to working for the Raras. ; : :A scientist in the employ of the Rara Army. She opposes the plan to force Mitsuki Rara to pilot HIMC, and warns her of her mother's machinations. Hayase later joins the Earth Defense Force and works alongside Ken Sanada. ;Kumu :An alien being encased in a shrine in Rara's Garden, where it advises Ayouko Rara in the army's dealings with the Earth Defense Force late in the series. After the world merge, it is represented as a small female dog gifted to the Sanada's that has a penchant for biting Kazuki (whether out of affection or not is not quite clear). ==List of episodes==