The main male protagonist. An ordinary boy bored with his ordinary life and with dreams of becoming a professional lifter, Renton's life is turned upside down when Eureka enters his life. He is one of the only people besides Eureka herself who can pilot the series's signature LFO, the Nirvash typeZERO.
Innocently Insensitive: He makes comments about the importance of image that get Eureka reasonably self-conscious about her scars and he doesn't realize it. He also says her Cosmetic Catastrophe is awful without realizing she was trying to look pretty for him.
I Will Wait for You: In the manga ending, Renton refuses to acknowledge that Eureka is dead and will continue to wait upon the day she returns back. The final page indicates they might have finally reunited after 2 years.
Living Emotional Crutch: To Eureka. After he flees from Gekkostate, she is constantly in grief at Renton's absence and determined to see him to the point that she departed from Gekko behind everyone's back, including her three kids, to find Renton. She was finally emotionally at ease when she was reunited with Renton.
Love at First Sight: He falls madly in love with Eureka the moment she crashlands near his grandfather's house.
Parental Abandonment: Renton's father is presumed dead, his mother is never mentioned, and his surrogate parent big sister disappeared. It later turns out that his father, and his sister who followed his research, were both willingly absorbed by the scub into its hive mind.
Absurdly Youthful Mother: Eureka has three adopted children and she's only about 14-16. Justified in that they're not her kids, but the children of some people she killed when she was in the SOF. Her horror at her actions prompted her Heel-Face Turn, so she adopted them.
Ace Pilot: She was a very experienced LFO pilot to begin with.
Beauty Is Never Tarnished: Subverted pretty hard. After her close call with being encased in scub, Eureka gets some nasty-looking scars that last for quite some time, her hair is left as a short, jagged mess and she loses her eyebrows. She gets reasonably self-conscious about it.
Bifauxnen: Due to having Boyish Short Hair at the time, Eureka looks almost like a male in her soccer attire in episode 39 thanks to her hair loss.
Blank Slate: The reason for her existence. The Coralians wanted to know what humans would write on the slate.
Body Horror: When Eureka's Coralian features begin to show towards the end of the series, one of the first stages of her transformation included growing giant luminescent boils growing all over the left side of her body.
Expy: Green haired girl with lavender eyes, who is a human version of the alien species mankind failed to communicate with and represents their one hope of communicating with them. Piloted a giant robot for the government as a killing machine. Raises children who are not her own and flies around the world on a skyship with a gray-haired loser in black? Eureka is definitely an expy of Final Fantasy VI's own Terra Branford, or at least has an uncanny amount in common.
Flower in Her Hair: In the final episode, the hairclip that Renton puts on Eureka has a flower on it.
Freakiness Shame: When Eureka's Coralian attributes begin to manifest themselves, her left arm sheds its skin and she grows a pair of green, butterfly-like wings. At first, she is worried Renton will reject her new form, but Renton admires her new wings and thinks she has become even more beautiful.
Friendless Background: She doesn't have any friends and doesn't open her heart to anyone prior to meeting Renton.
Hair Reboot: She spends a significant portion (episodes 21-41) of the series with her hair as the short, jagged mess left behind after her close call with being encased in scub, but it grows back instantly when she speaks with Sakuya.
Heroic BSOD: In the manga, when Renton, in his own Heroic BSOD, told her to leave him alone when she tried giving him some fruits to cheer him up.
Ill Girl: In the first season, she often suffers from chronic headaches and by the second season her mental and physical health have deteriorated to point where she can barely stand. This was probably due to the fact that her connection to the Nirvash was deteriorating and she felt that it was favoring Renton as it's pilot rather than herself. Plus, her ailments really put her over the edge after she comes in contact with the Coralians in Episode 11.
Innocently Insensitive: In the first episode, she did an insensitive thing by burning Renton's house down and she does not seem to comprehend why Renton reacted so miserable about it.
Maternally Challenged: She's raising three orphans despite knowing little to nothing about taking care of kids. As a result, she spoils them and gets them presents that aren't too appropriate, such as textbooks that are too advanced for them.
Messy Hair: She loses a significant amount of hair after being absorbed by the Scub Coral in the 19th episode and what is left of it is rather messy. After episode 41, it grows back to a bob haircut.
Non Human Lover Reveal: She is later revealed as a Coralian and fears that Renton will reject her, but he rather accepts her for who she is, not what she is.
No Social Skills: Due to her backstory as a Tykebomb, she does not even know what is "cool", what love is and how to be pregnant with a baby. She eventually becomes a more sociable person towards the end of the series, thanks to the influence of Renton.
Phlebotinum Girl: In her backstory. A young alien girl and the key to piloting the Nirvash who was used and manipulated by the government and blindly followed their orders until she realized what she was doing was wrong and defected along with Holland.
Pinocchio Syndrome: She secretly in her heart wishes to be a human in order to be with Renton.
Scars Are Forever: Before leaving Sakuya's Heart, Eureka is offered to have her scars from being absorbed by the Scub Coral fixed but she declines saying that these scars are the outward proof of what she has been through. Upon emerging, Eureka's scars remain, but they have become less prevalent.
Sugar and Ice Personality: At first, she mostly comes off as very reserved and emotionally-distant due to her lack of understanding of human feelings, yet she's a kind and motherly girl. Eventually, her warmer personality takes over.
Tykebomb: She was used by the government and trained to kill almost remorselessly, until one day, when she was checking a pile of corpses looking for wounded people to finish off, she found three orphans, had a huge epiphany, and decided then and there to adopt them and defect from the military.
Unusual Eyebrows: She loses her eyebrows after being absorbed by the Scub Coral. She regains them after talking Sakuya, along with her hair growing back to a bob haircut.
Clingy Jealous Girl: The root of her issues is that she can't stand the mere thought of Holland paying more attention to Eureka than her and the fact that she's afraid that he hasn't gotten over his feelings for Diane yet.
The leader of Gekkostate. Holland was once a member of the military, but defected and formed an anti-government movement. To the public, he is known as the world's top amateur lifter and is Renton's longtime idol. He pilots the Terminus typeR909.
Sergeant Rock: Sure, Holland might be a MAJOR asshole at times, but he's respected and even liked by the Gekkostate crew because he's competent, wouldn't have them do something he wouldn't do himself, and despite his outward Jerk Ass, is rather concerned for their welfare.
Shameless Fanservice Guy: While inside the Gekko he wears nothing but his underwear. Since the ship is his home, he doesn't see anything wrong with it.
What the Hell, Hero?: After everyone else fails to get through to Holland about his treatment of Renton, it's Eureka's crushed and soft-spoken disappointment in him for what he's done that finally turns him around.
Photographer and main editor of Ray=out. He was also a former member of the military and defected with Holland.
Eureka's adopted children, who she took care of after she killed their parents during a military raid. They are fiercely protective of their "Mama" and like to play pranks on Renton, but warm up to him over time.
My New Gift Is Lame: Eureka tends to get them textbooks as presents (usually ones that are too advanced for them). She does put thought into it, she just has no idea what they might like. And they need an education, after all.
Parent with New Paramour: They don't approve their "mama"'s relationship with Renton, usually get in the way of Renton towards Eureka' heart and are afraid that Eureka chooses him over them. They eventually accept him as their adoptive dad.
Spoiled Brat: Being inexperienced as a mother, Eureka has a tendency to spoil them.
Meaningful Name: According to one of the definitions given by Urban Dictionary, a moondoggie is 1960s slang for a habitual marijuana user. Almost certainly deliberate given the series' large amounts of references to 60s counterculture (and the presence of a character named Stoner).
It's also a reference to the character in the Gidget franchise, just as the character's real name (see Only Known by Their Nickname below) is a reference to James Darren, the actor who played Moondoggie in the three original films.
The main antagonist. Once a disgraced military official following Holland's defection, he has risen to power with his maniacal devotion to "save" the world from the Coralians. Also Holland's older brother.
Dark Messiah: Becomes one, when the Ritual of the King becomes laid out to us.
Faux Affably Evil: While he can be charming and seductive in order to get what he wants, he is ultimately revealed to be a coldhearted sociopath driven solely by his hatred for the Scub Coral and his brother, Holland.
No Celebrities Were Harmed: His character bears an uncanny resemblance to Adolf Hitler, the dictator of Nazi Germany, given how he similarly plots a campaign of mass murder and deception that causes devastation on a global scale in order to satisfy his own hate.
Never My Fault: Blames Holland for the succession ritual failing when he caused it in the first place.
Pilot of the Federation LFO, Nirvash typeTheEND. Prone to violent mood swings that can only be controlled through the use of lethal sedatives, she refuses to listen to anyone other than Dewey. Owns a strange badger-like pet named Gulliver.
Anger Born of Worry: When she goes to save Dominic after she accidentally attacks him with her mech while he's falling from the sky, clinging to a ref board to try and save her. She admonishes him for doing something so reckless, even though they're both in a freefall at this point. Now she's normally been pretty harsh on poor Dominic until now, but fortunately for him, she lets it slide. Cue Big Damn Kiss.
Anti-Villain: As we discover more of her true personality and tragic past.
Human All Along: Her appearance and role (and possibly her name) seem to imply that she is a Coralian. It turns out she's just a human whose appearance and abilities have been modified by horrible military experiments.
Ill Girl: Anemone takes a stimulant to deal with her Desperation Disease, which is highly addictive and extremely dangerous. That doctor even says her resistance to the drugs was her greatest value. She does not appear to need it, however, and she mostly takes it before combat under the belief that it makes her fight better.
I'm a Humanitarian: During her first encounter with Renton in a dream state she tries to eat him.
Latex Space Suit: She wears a black form-fitting suit with nipple highlights when she pilots TheEND (and she does that suspended from all limbs in the cockpit in a way that accentuates her form even more).
Love Hurts: When Dominic seemingly abandons her, she finally realizes how much he means to her, but believes it's all too late. She delivers a gut-wrenching soliloquy, convinced that she doesn't deserve to live. Fortunately, Dominic arrives just in time.
Love Redeems: In Episode 48, her love for Dominic changes her for the better.
Meaningful Name: Anemones are linked to bloodshed in Greek and Christian mythology. When Dominic gives her a couple of anemones as a present, she asks if he's mocking her — he didn't realize that anemones mean "disappearing hope."
Phlebotinum Girl: A young girl that definitely isn't a normal human, the pilot of a powerful Humongous Mecha and a test subject of an attempt to copy Eureka's Coralian nature. She's used and manipulated as a human weapon, blindly follows the orders of her evil boss and is both very physically frail and mentally unstable.
The Tease: In the manga, she has fun asking Renton if he wants to sleep with her. She also seems to make passes at Eureka.
Tsundere: Played for Drama. She spends most of the series being absolutely brutal towards poor Dominic. Eventually, she realizes she is in love with him and she regrets not telling him how she felt before he went AWOL.
Badass: You don't realize it until you see him twist the arms of thugs twice his size without any visible effort, as well as his ability to shoulder Anemone's improbably heavy Gulliver without extreme strain. There's also the stuff he does while saving Anemone in the manga, like shrugging off laser burns.
Easily Forgiven: The Gekkostate crew decides to trust him implicitly as soon as he shows similarities to Renton, especially his commitment to the one he loves.
Enemy Mine: He and Renton are forced to work together to save Eureka and Anemone.
Even Evil Has Standards: Calling him evil is a bit of a stretch, but he will NOT stand for inhumane experiments performed on young women to make them into pilots for TheEND. ESPECIALLY if Anemone already suffered through such a treatment herself.
The male protagonist of the video game prequels New Wave and New Vision. After graduating New Wave Academy, a school for future military recruits, he and most of his friends joined the Sawyer Team KLF group. His beliefs and love for Ruri convince him to rebel against the military at the end of the first game, and deliver a captured Nirvash to Holland and Eureka.In the second game, he, Ruri, and Moondoggie fight against the Azure group and corrupted members of the military, including some of Sumner's old friends, to prevent mass destruction.
Sumner: There are three of us here, but it doesn't matter. I'm still alone. I guess what I'm trying to say is why don't these two DO ANY OF THE WORK!?
Single-Target Sexuality: Without even realizing it! Utter lack of interest in anyone else aside, he was mildly obsessive over both B.B. and the girl he saw once by chance, as others note, but ends up with Ruri—except they're all the same person.
Sugar and Ice Personality: As a teenager, due to believing his classmates only saw him as a Sturgeon. Around others and once he realized that wasn't the case for everyone, he's significantly warmer.
Sumner's love interest. In New Wave, she left New Wave Academy after learning about the military's insidious motives. Although her efforts to rebel lead her to aligning with black market dealers, she eventually reunites with Sumner long enough to help him realize what path he should follow.In New Vision, Ruri is able to meet Sumner again, and they (and Moondoggie) try to stop a military scheme that is driving their own pilots insane. After the conflict is over, she and Sumner remain together.Ruri also made an appearance in the manga adaptation. Here, she is a spy for Gekko State in the military, and helps them fight Dewey's plans, as well as facilitate in Dominic's Heel-Face Turn.
Canon Immigrant: Started as a main character in the prequel video games (that are prequels to the anime) and then became a main character in the manga, which is an adaptation of the anime (albeit one that goes in a completely different direction)
One of Sumner's companions when he was a member of Sawyer Team. Between New Wave and New Vision, an experimental drug given to him by the military drives him insane, turning him into one of the main antagonists of the second game.
One of Sumner's companions when he was a member of Sawyer Team. Initially possessing a crush on Ruri, he considers Sumner his rival until Sumner beats him in a fight. During the timeskip between New Wave and New Vision, he's promoted to second lieutenant.
Crazy-Prepared: In the manga, he tells Holland to go to work while throwing a wrench from his toolkit at his head that's specifically labeled "For Holland".
Go Karting with Bowser: He and Dominic got along really well, even though Dominic was still on the villain team at the time. He even taught Dominic how to fix his bike, and Dominic promised to check up on his grandson. Then again, he never finds out what side Dominic was on at the time.
What Happened to the Mouse?: A defining part of the series is Diane and her disappearance's effect on Renton and Holland. In the anime at least. There, it is revealed that she had a relationship with Holland and somehow found her way into the control cluster with her father. In the manga, Holland's close relationship with Diane disappears from the narrative and Holland has a mentor-student relationship with Adrock Thurston instead. It is also revealed in the manga that Adrock was assassinated by Dewey. Diane still disappears, but her disappearance is completely unexplained.
Charles and Ray Beams
A pair of mercenaries-for-hire and a loving couple. They hold a grudge against Holland and Gekkostate in general.
Gasshole: Crops up whenever he's dragged into religion vs. science discussions, such as ones that bring up elements like the Vodarac, Coralisn. or Sub Coralian. Tends to coincide and overlay with Obfuscating Stupidity.
Eureka's predecessor. Because she was a girl of mysterious power, the religious authority of Vodarac thought she was some sort of messiah and placed her in the central part of the temple. They banned any disciple from speaking to her, and allowed very few select disciples to care for her in a highly reverent, if sterile, manner. For forty years since her initial appearance, she had no significant contact with anyone. This changed when Norb was assigned to care for her.