The 12 year-old main character. He apparently has the "right kind of head" to be used as an N.O. channel. He dislikes bitter drinks and spicy curry.Naota is obsessed with appearing mature and attempts to act nonchalant. This is most expressed in hismonologues which open and close each episode where he continues to claim that "nothing amazing ever happens here" despite the show's surreal and often absurd happenings. Naota idolizes his older brother Tasuku and believes him to be the model for a mature adult.At the beginning of the series, he's noticeably bothered by the situation with Haruko, but over the course of the series he develops a crush on her that overlaps with his initial crush on Mamimi.
Becoming the Mask: Tries to put on a mask of being a mature adult, despite being 12 years old. Various characters try to further this process or halt it. Haruko eventually convinces him it's okay to act his age.
I Choose to Stay: When Haruko asks (and then reneges) Naota to join her in her pursuit of Atomsk, despite just having confessed his love for her, he doesn't seem heartbroken or rejected, implying that he would've played the trope straight if he'd had the chance to answer her.
Love Martyr: For Haruko. In the final episode, he confesses his love for her while she's trying to kill him. However, at the end of the episode, he wises up and decides not to follow her into space when invited to and she leaves to continue her chase after the Pirate King Atomsk.
Made of Iron: How many times does Naota get ran over in this series? It gets to the point that after getting ran over by a truck in episode 5, he recovers in mid-air.
Missing Mom: His mother is never seen or mentioned in the anime or manga. The novels, though, tell us that she vanished mysteriously when Naota was little. Also, she was a colleague of Haruko in the Space Police.
Nice Hat: Actually no, people don't really think the hat's cool. Even more-so is the the one he wears when cat ears pop up on his head.
Took a Level in Badass: At the climax of "Brittle Bullet", Naota breaks free of his dependence and desire for Mamimi's affection by outright rejecting it and summoning Canti to fight the giant gunslinger robot. And then later in "FLCLimax", absorbing the power of Atomsk and entering a sort of Super Mode.
Wacky Parent, Serious Child: Naota is fairly normal, but his father Kamon is extremely immature, suffers emotional mood swings and exhibits inappropriate sexual behavior.
An energetic, spontaneous pink-haired woman from outer-space, and investigator for the Galactic Space Patrol Brotherhood/Stellar Fraternity. She rides a sunglow Piaggio Vespa SS 180 and carries a blue Rickenbacker bass guitar on her back and claims to be 19, even though she's not human. She becomes the Nandaba household's maid after running both Naoto and his father over with her Vespa and plays on a rival team of the Mabase Martians.
But Now I Must Go: After Atomosk escapes from Earth, Haruko leaves to chase after him. At first looked to be subverted in that she asked Naota to join her, but she immediately plays it straight by retracting the offer because he's "still a kid."
Hammy Herald: How she introduces herself in "Fooly Cooly" and "FLCLmax".
Haruko: (revs up moped) Awright! (blasts off at breakneck speed)LUUUUUUUUUUUUNNNNNNNCCCCCCCHHHHHH TTTTTTTTIIIIIIIIIIIIIIIMMMMMMMMMMMMMMMEEEEEE!!!!!!!(runs over Naota with Vespa)
Heel Realization: Heavily downplayed due to being openly and happily sociopathic, but in the final episode, getting beaten down by Naota and seeing Pirate King Atomsk save the world from a disaster she nearly caused leaves the normally Ax-Crazy girl speechless for a few minutes. She could've easily taken revenge on Naota during that time, but instead decides to chase Atomsk and leave Naota behind, perhaps realizing that bringing the kid along isn't the best thing for either of them.
Human Alien: At first glance, though it might not be her true form.
Improbable Weapon User: Her Model 4001 Rickenbacker bass guitar, which seems to have an engine in it, shoots bullets and can apparently levitate.
Instrument of Murder: Her bass, again, which seems to do everything from batting robots to shooting bullets.
Male Gaze: She gets quite a bit of them toward the end of episode 5. First, she comes out of nowhere wearing a playboy bunny outfit, without explaining why or where she got it from. Then we get a big view of her surprisingly big boobs which bounce as she attacks Atomisk. Then throughout the fight, we get several gratuitous shots of her ass.
Master of Disguise: She tries at least. Most of the time her disguises are pretty transparent, but when she really wants to disguise herself, she's capable of changing her voice and mannerisms so completely that her victims don't realize the difference. That is, until they hear their nurse's voice change mid-sentence, and then look up to see her sporting a great big Slasher Smile.
Older Than She Looks: She claims to be 19, but Naota has his doubts about that. It's later implied that when she and Amarao first met, he was Naota's age.
It should also be noted that since she's an alien, it could very well be that she is 19.
Pet the Dog: In spite of her excessive selfishness and manipulation and feeding Naota to the Terminal Core, she seems to have truly become fond of Naota by the end. Notice how, by the end, she offers Naota to join her in her pursuit of Atomsk, but rescinds it once she remembers that he's a kid.
Playboy Bunny: Puts one on for no immediately discernible reason during the battle in episode 5.
It's a reference to the videos for the Daicon fan conventions that Gainax created when it was first starting out.
Space Police: Haruko claims to be one, but she's apparently gone rogue.
Stealth Hi/Bye: More emphasis on the "bye" part than the "hi". But when she really feels like it, she can become an expert at the "hi" as well.
Town Girls: The Butch to Eri's Neither and Mamimi's Femme.
Transformation Sequence: She parodies this in the second episode, going through long, elaborate motions in a blinding light with a long drumroll just to restyle her hair, sport a halo and purple wings, and large, extremely goofy sunglasses on top of her stolen nurses' uniform.
The Unfettered: In order to free the Pirate King Atomsk, she continually manipulates Naota and his family.
The Unreveal: We never actually find out who she is or where she comes from, but we at least get a few more hints.
Villainous Breakdown: In episode 6, Haruko becomes absolutely livid after Naota absorbs Atomsk's power. Her defeat really seems to have mellowed her out by the end.
Villain Protagonist: She is hinted to be one through the series. It's confirmed by the final episode.
A truant high school student with pyromaniacal tendencies, she's apparently Naota's brother Tasuku's girlfriend, though she is in some sort of relationship with Naota since his brother left Japan. She also smokes a lot and spends most of her time under a bridge. She is often seen with a camera, and always smokes a worn cigarette with "Never Knows Best" written onto the paper. It is implied that she is often bullied at school, causing her to often ditch.
Affectionate Nickname: Mamimi calls Naota "Ta-kun" during the series, which was her petname for Tasuku.However in the epilogue, she says "See you later, Naota" in goodbye, showing that she was no longer using Naota as a substitute for Tasuku.
Kid with the Leash: She does this with the the Terminal Core, a disembodied robot with a dog-like personality and a ravenous appetite for machinery, which she uses to get revenge on everyone who did her wrong.
Smoking Is Cool: She is the only character in the show who smokes. However, this isn't seen as a positive thing by the other characters and whenever she starts chain-smoking, it's usually a sign that her mental state is on a downward curve.
Town Girls: The Femme to Eri's Neither and Haruko's Butch.
Verbal Tic: Has a tendency to end her sentences with "~su."
Yandere: She loses it when she finds out Tasuku has an American girlfriend.
A medical robot with what looks like a television set for a head. He was manufactured by Medical Mechanica, but taken over by Atomsk as a way to escape them. After having his head broken by Haruko, he is recruited by her as an assistant; however, he proves to be no good for much other than washing dishes and fetching drinks for the family.When called into battle, he can access Atomsk's power using Naota as a catalyst.
BFG: When channeling Atomsk, he gains the ability to transform into an antitank gun. Some fans theorize it's a pitching machine.
Naota's classmate. In the series, she is referred to as Ninamori, her last name. She is the daughter of the mayor of Mabase and is class president.She projects a proper, even slightly stuck-up personality, and conceals personal information to an almost obsessive degree. Eri isn't above breaking the rules to get what she wants. She rigs the voting during the casting for the school play in order to get the lead role in a play version of Puss in Boots and have Naota cast opposite her, which (along with other instances) hints at a crush on him.
Aloof Dark-Haired Girl: She's taller than Naota and the tallest girl in her class according to the novels, but unlike for most girls her age her height seems to have no effect on her self-esteem or popularity. The mature and distant personality may be somewhat of an act, though.
Town Girls: The Neither to Mamimi's Femme and Haruko's Butch.
Tsundere: Type A. Though this makes her by far the sanest of Naota's potential love interests.
Unfortunately, it also makes her the least pleasant to be around, given the circumstances of episode 3. At least Mamimi didn't force him to participate in events without having any fair say, while Haruko was a shoulder for Naota to literally cry on. For him, there's always the Celibate Hero option.
Wise Beyond Her Years: Everyone believes this due to her stoic mask, though it doesn't come true until later in the series.
An agent from the Department of Interstellar Immigration, a The Men in Black-like agency. This agency, among other things, acts as a middle man for negotiations between the government and Medical Mechanica. Thus, Haruko is a big problem for them as she is bent on provoking an attack by disrupting communications.Unlike other adults, such as Naota's father and teacher, he is mature and serious about his job. He has a pair of eyebrows so large, people can't help but drop everything they're doing and just stare at them. He seems to have had a past relationship with Haruko similar to Naota's, and knows more about her than anyone else in the series.
Badass Normal: He can hold his own against Haruko as long as his guns have bullets.
Knight of Cerebus: A very mild example, but the plot finally starts to advance as soon as he appears.
Know-Nothing Know-It-All: While he knows significantly more about Haruko and Medical Mechanica than the rest of the cast, he still knows next to nothing and rather fills the gaps in his knowledge with his own incorrect guesses.
Magic Feather: His eyebrows are implied to be this. While he claims they block N.O usage, there's really no evidence that supports this, coupled with all of his talk about how macho they make him and his immediate breakdown after losing them, they're more for confidence than anything.
Mister Exposition: His ramblings about Medical Mechanica and the Pirate King Atomsk help to tie the more surreal parts of this series together.
Only Sane Man: Initially comes off as the only adult in the entire series with the maturity that Naota seeks to replicate. While he is this to some extent, his maturity is just a front and he's overall no wiser than Naota.
The Stoic: He remains calm and composed throughout all of his interactions with Naota, in contrast with the rest of the cast. Once he's forced to actually get out and do things, however, he's revealed to be a loud crybaby.
Sweet Tooth: He adds way too much sugar to his coffee, and at the hair salon he asks for a lollipop.
Teeny Weenie: In contrast with Naota's guitar, Amarao's is barely slingshot-sized. This is implied to be the reason why Haruko abandoned him.
Not So Different: Sees Naota as a younger him and most of his time is spent preventing him from making the same mistakes as he did, such as falling for Haruko.
Naota's 47 year-old father, a former pop culture journalist working as a freelance writer, with his own trashy tabloid: "Kamon-Mabase" (the title is a pun of "come-on mabase"). He makes the most references to pop culture. Like the other adults in FLCL, Kamon is extremely immature, notably more so than the other adults. However, he shows a surprising amount of seriousness and thoughtfulness at some points in the anime.
Abusive Parent: On top of becoming jealous of the relationship that Haruko and Naota develop, leading to him challenging his own son to an airsoft match for her love, his general Man Child tendencies are hinted to be the main reason that Naota tries to act like an adult.
Dumbass Has a Point: Despite being a completely immature manchild, he's surprisingly insightful. He figures out Mamimi's family situation long before Naota simply though her buying habits at the bakery, recognizes that Ninamori is only pretending to act mature and also hates him for publicizing her father's affair, and in episode 6 covers for Naota's absence at school since "he's enjoying his freedom."
Gag Penis: Gets one during the second round of manga visuals in episode 6.
Hidden Depths: He delivers some surprisingly insightful lines throughout the show, and it is subtley suggested that he is comfortable enough with his identity that he doesn't try to pretend to be something he isn't, which is the problem that Naota struggles with throughout the show.
Naota's grandfather. He owns the family bakery and coaches the local baseball team, the Mabase Martians. He has a grudge against Mamimi for unspecified reasons, but it is suggested that he didn't approve of Tasuku dating her. Shigekuni values baseball more than anything in the world — he is disappointed in his own son and younger grandson because they are lousy baseball players. Though like his grandson, he cannot stand spicy curry.
Voiced by: Kazuhito Suzuki (Masashi, JP), Steve Blum (Masashi, EN), Akira Miyashima (Gaku, JP), Bob Marx (Gaku, EN)
Two of Naota's friends/classmates, both 12 years old. Masashi generally sounds slightly depressed and always has a look of apathy while Gaku is somewhat hyper and is obsessed with kissing and other things of sexual behavior while constantly saying "chu" ("Smooch" in the English version.) Masashi also has a job as a delivery boy, and drives his dad's truck around, even though he's only in grade school.
Broken Record: Gaku. Particularly episode 1 "Pervert! He's a Perverrrrt!" and also "Smooch! SMOOOOOOOOCH!!!!!"
Expy: They look quite similar to Keisuke and Toji, Shinji's best friends from Neon Genesis Evangelion, with their general natures switched.
An agent who works with Amarao. She's perhaps the most soundly mature off all the characters, devoted to her position as lieutenant and a pinpoint sharpshooter to boot. However, Kitsurubami has a touch of fangirl in her that pops out from time to time. Amarao has a crush on her, but she's become utterly repulsed at his unwelcome and creepy advances toward her- especially when she takes notice of his peculiar "eyebrows."
An enigmatic character, apparently the most powerful "space pirate" in the galaxy, according to Amarao. His N.O. is great enough to steal entire solar systems. He has a nose ring identical to the metal ring on Haruko's bracelet, which allows her to detect Atomsk's presence or the activation of N.O. in general. Canti is able to channel his power for a brief period of time, augmenting him with strength and powers of superhuman feats.
Chessmaster Sidekick: Whenever Canti eats Naota and turns red, it's Atomsk doing all of the fighting, despite Naota getting all of the credit.
Even Evil Has Standards: In the last episode, he absorbs the exploding Terminal Core and flees with its energy, preventing an Earth-Shattering Kaboom... though to be fair, he may only qualify for this trope since Haruko was willing to blow up the Earth just to get Atomsk's power.
Meaningful Name: Named after the novel Atomsk, by Carmichael Smith (a pseudonym of Paul Myron Anthony Linebarger, better known as Cordwainer Smith).
No Pronunciation Guide: The anime pronounces it "atomisk" or "atomos'ku" (dub and sub, respectively), though the director's said he's not sure how it's really supposed to be pronounced.
Power Floats: His N.O. is so immense, it screws with the Earth's gravity.