Adaptation Dye-Job: Somewhat. In the manga her hair is bright pink, but the anime has it as a notably darker shade of pink. Also, in the manga her eyes are green instead of red.
Apocalypse Maiden: Toward the end of the manga, her homicidal Diclonius instincts personality finally takes over and starts killing humans everywhere on the world at rates that would make the deadliest WMDs look like mere fireworks in an attempt to destroy humanity in a spiteful decision that since Diclonii, and mainly her, can't rule the world, she'll destroy it.
I Cannot Self-Terminate: Toward the end of the manga, Lucy/Kaede and Nyu personalities beg Kouta to kill her now that her homicidal Diclonius instincts personality has finally taken over.
Identity Amnesia: The switch between Lucy and Nyu and back is triggered by either a nasty injury (usually a blow to the head) or a very traumatic memory.
Important Haircut: Lucy/Nyu's long hair gets chopped off to impersonate Kouta's younger sister Kanae to signify Lucy's guilt over the incident where she killed her. Coincidentally, it also makes her resemble her younger self.
The female protagonist of the series, she is a teenage Diclonius around 15 years old in the beginning and 17 in the end. Lucy has four vectors with a limited range of two meters. However, she demonstrates prodigious control over her vectors and can be swift and lethal within that range in addition to being able to use nearby objects as high velocity projectiles to kill at greater distances. She is also capable of stopping or deflecting most standard ammunition. Her great skill, murderous intent and ability to reproduce have caused her to be regarded as the most dangerous of the Diclonius.Lucy hates humans mainly because of how she was treated by her human peers as a child. Consequently, she discounts non-Diclonii, claiming they are not real people, to the point of stating that she has "not killed anyone yet". She seems to lack empathy, kills without much concern, and acts sadistically. Despite this lack of concern for human life she will not harm Kouta, as he was her only childhood friend.
Bully Hunter: Though not actively hunting, Lucy takes this trope to the logical extreme and beyond in her backstory. Just...don't hurt dogs near her, ok? Less a case of wanting to get her own back on bullies, more a case of having a full-on psychotic break.
Curb-Stomp Battle: Pretty much any "fight" she takes part in, although this is reversed in the battle between Lucy and Mariko, but only in the Anime. And also completely Inverted in her second fight with Bando in the Manga. Averted by her duel with Nana, which is more or less an even match; Nana gets the advantage, but Lucy wins because she's far more willing to hurt Nana than vice versa.
Determinator: No matter how many people oppose her. She willfind Kouta and she will apologize to him, and anyone who gets in her way will die. Horribly. Also, if your name is Kurama, don't ever let your loved ones near her. She will kill every last one of them. And there's nothing you can do to stop her.
Emotionless Girl: As a child until the children at her orphanage killed her puppy right in front of her.
Evil Is Hammy: Loves setting up cruel Mood Whiplashes in particularly creepy ways, to the point where she may even be Trolling the readers. Loves laughing on the dead bodies of her victims. Always boasts and taunts about her power whenever she meets a foe she hates. And yet can somehow find a reservoir of Moe whenever she's near Kouta and boast about why she loves him.
Evil Laugh: Manga-only. On some pages, it is rendered with an extremely thick font.
Evil Redhead: Though she is more specifically a hot-pink head.
Evil Sounds Deep: Lucy's voice is deep and quite ominous in comparison to Nyu's chirpy, childish, high-pitched voice.
Expy: Many of Lucy's traits are identical to Johan Liebert. Both of them were once innocent kids, but turned insane when affected by secret military experiments(in Lucy's case, her insanity was the result of the DNA voice stemming from her Diclonius instincts, which in turn, the Diclonius are the result of a secret government program), are experts at manipulating people, are comparable to The Antichrist, have ambitions to end the world, passion of destroying human life, multiple personalities, traumatized their lovers, an obsessive and murderous love towards someone that cares for them, Biblical and German-related motifs, and try to have the person who actually cared for them kill them.
Also, her traits matched with Lunch. Both have multiple personalities; one is a ditzy nice girl, and the other is a sociopathic heroine, but also stoic. Eventually, the latter sides eventually gain a heart of gold and working with the main character and his friends. That gives them both an odd friendship with a girl who is a non-combatant (Yuka and Bulma) and an unrequited love interest (Kouta and Tien). They eventually disappear after the end of their works (while the former being killed by Kouta in the manga and having her bad side killed by the army in the anime with the latter being written out).
Forgotten First Meeting/Forgotten Friend, New Foe: Kouta initially met Lucy in his childhood after she killed her first victims. Unlike everyone else, he found her horns fascinating and forged a strong bond of friendship with her, thus keeping her murderous Diclonius instincts repressed. However, he erased her from his memory after she brutally killed his father and sister right in front of him because he neglected to specify his cousin's gender.
Freakiness Shame: She hated her horns since she was bullied because of them, but Kouta told her he thought they are cool.
Hearing Voices: This is how the (presumably) genetic urge to Kill All Humans manifests itself to Lucy for the first time. It probably put a damper on her childhood relationship with Kouta when she didn't even notice that she was strangling him.
The Heartless: Her "DNA" voice could count since it's the result of all the abuse she went when she was a child.
Heroes Love Dogs: Well, not really a hero, but she clearly has a soft spot for dogs. It was the brutal murder of a puppy that she cared for that finally made her snap.
Heroic RROD: Toward the end of the manga, she literally melts due abusing of her telekinetic powers.
Heroic Sacrifice/Superpower Meltdown: Toward the end of the manga, Lucy goes into a literal meltdown due abusing of her telekinetic powers while destroying some planes and then for saving Kouta.
Karma Houdini: Averted in the manga; Kouta does not forgive her for brutally murdering his dad and sister in cold blood, and she dies by Superpower Meltdown, but the personalities of Kaede and Nyu are reincarnated as twin girls and are reunited with Kouta some years later. In the anime, however, she is implied to survive her last showdown with the army, and while Kouta doesn't exactly forgive her (or at least not her actions), he's much more sympathetic to her plight, and he'd rather see the killing stop than seek revenge.
Her Anime fate can very well be a subversion of this, as it's strongly implied (even more do of we add an element from the Manga) that Kaede purposefully killed her Lucy side so Nyuu can finally live in peace with Kouta.
Kick the Morality Pet: She brutally killed Kouta's father and sister Kanae because he lied to her about his cousin's gender. Quite a bit of guilt over said incident remains in her heart.
Long Lost Sibling: In the manga, she has a younger half-brother, the first male Diclonius. Upon meeting each other, she kills him. She doesn't hate him, but she did it because their kind can't exist anymore and the fact he was being controlled by Kakuzawa, making it a Mercy Kill.
Made of Iron: She survives taking an anti-tank slug to the head in the first episode. To be fair, though, the thing barely grazes her, she's wearing a helmet, and she has her vectors to protect her. She still does survive falling hundreds of feet off a cliff into the ocean without drowning immediately afterwards though.
Meaningful Name: Can be seen alternatively as a female version of Lucifer (the devil, which fits her role as an evil mass-murderer), and also sounds like "lucid," which could refer to Nyu only initially talking in full sentences when Lucy is at the wheel.
Lucy is also the name of a protohomonid skeleton with an upright gait and small brain capacity, suggesting a missing link between the great apes and modern humans. Lucy, being the first of her kind capable of "proper" reproduction, could also potentially serve as a missing link between humans and some future Diclonius race.
Monster Progenitor: She's not the first diclonius by a long shot, but her vectors are capable of spreading the diclonius condition to the gametes of humans she touches with them.
And how can we forget that she's the only fertile female of her species.
Murder the Hypotenuse: This is what she is trying to do to Yuka. The only way that stops her from attempting to do that is Kouta's presence near her. In the flashbacks, she does this to Kouta's sister and father.
Off with His Head!: Her preferred method of killing people she hates. It's swift, fast, bloodless, and efficient. Everyone else (including Bando) fall under Ludicrous Gibs.
Omnicidal Maniac: Pretty damn much. Justified, in that Kaede, the original personality, had been put through so much abuse that she created Lucy specifically to act on her (supposedly) inborn drive to butcher all humans.
Only Known by Their Nickname: Most people seem to either not know or forget that "Lucy" isn't her real name. As revealed toward the end of the manga, "Lucy"'s real name is Kaede.
Retired Monster: She was desperately trying to atone for her killings of Kouta's father and sister but utterly fails at that when Kouta realizes in the end that she's capable of hurting people indiscriminately and declares that he hates her.
Sanity Slippage: A chapter dedicated to her childhood shows she got so unstable and murderous through this trope.
Senseless Sacrifice: Before her capture (sometime after she killed Kouta's father and sister), she turns herself in as a final attempt to give humanity a chance and to save a new friend's life. She later finds out when being bound in the very place first seen that her friend died from her wounds and that practically drove Lucy to cross the Despair Event Horizon.
Shameless Fanservice Girl: Unlike Nyu, she does know that being naked is a problem, but she often has other things on her mind.
Sociopathic Hero: She does show lack of regard for human life and has shown empathy for other people (namely Aiko) in the past, but by the time Elfen Lied starts, she's too far gone in her hatred of humans.
Sugar and Ice Personality: For all of her Yandereness, Lucy's cold and deeply cynical, but only because she's been hurt so badly every time she lets her guard down. She may slaughter humans without hesitation or remorse, but her capacity for love is still very real.
Superpowered Evil Side: She's it, except there's an even more evil side that's essentially her basic instincts.
Vomit Discretion Shot: During her breakdown at the summer festival we hear he vomit with the back to the audience (Strangely, tons of severed heads and oceans of spilt blood are not as bad as a small pool of vomit).
Weak, but Skilled: She's actually not that powerful compared to some of the other diclonii; Nana has longer vectors and can hold her at bay, while Mariko is an outright nuke. Lucy is a far more experienced killer, and when Nana tries to go easy on her, Lucy rips her limbs off.
Subverted in the end of the manga where her vectors can split islands and have a reach of at least hundreds of kilometers.
Woman Scorned: Sure, Kouta! Don't tell Lucy that you're going to the festival with your female cousin! Even if she finds out, it's not like she'll go so far as to murder your little sister, your father, and dozens of other people, right?
Yandere: Played Up to Eleven. As it turns out, the reason she killed Kouta's father and sister was that she was angry at Kouta for lying to her and saying that the cousin he was going round the festival with was a boy instead of a girl (apparently, even if Kouta did tell her it was a girl, someone was going to die anyway). Disproportionate Retribution at the worst, although she seriously regretted it later, to the point that the thought of eventually apologizing to him gave her the will to survive.
Not a separate character in the strictly technical sense, Nyu is the split personality of Lucy that developed after a .50 BMG round grazed the metallic helmet protecting her head. Nyu has a childlike personality, an infantile knowledge of the world, and lacks spoken language skills, only able to say "Nyu" and "Kouta" most of the time. Nyu is innocent and incapable of violent acts, a foil to the normally cold and sadistic Lucy; she is the manifestation of Lucy's "good side".When Nyu is attacked violently she regresses into Lucy; likewise, when Lucy is treated with love and kindness or wants to hide herself from Kouta, she will switch back into Nyu. While Nyu exists first due to trauma, it is believed that Lucy subconsciously encourages her presence due to her feelings of guilt towards Kouta. In the manga, this is confirmed by Lucy herself.
Beware the Nice Ones: Let's just say that putting her in danger, hitting her on the head hard enough, or getting her drunk or drugged will make her revert to her Lucy persona.
Blank Slate: She has no useful speech abilities, latches emotionally on to the first people she meets, and frequently doesn't seem to understand what's going on. The anime cuts off before Lucy is reduced to an extended coma and Nyu is allowed to develop. She is even able to talk in full sentences, and is, at that point, a full personality that directly contrasts Lucy perfectly. She still keeps her Verbal Tic, though.
Cute Mute: In the sense that her trauma left her with a very limited vocabulary.
Heroic BSOD: When she is captured again, she thinks it was impossible that her actual side is the killer.
Innocent Fanservice Girl: Too many incidents to count. Probably the most notable is that she has walked up to Kouta and shoved his hand against her breast, twice, and the 2nd time they were both naked.
An 18-year-old student who arrives in the Kanagawa Prefecture to attend college. He is the male protagonist of the series. Kouta lives in a closed-down inn with his cousin, Yuka, while attending university.Kouta has repressed traumatic memories of witnessing, firsthand, the deaths of his father and sister. He ended up in a psychiatric ward for over a year following the event, but eventually made a full recovery. As a result, he is particularly sympathetic towards girls in trouble and is extremely generous to and protective of the girls around him. He is very kind and gentle as well, offering to shelter the various suffering characters he and Yuka stumble across, and treating them as part of his family. He and Yuka both initially meet Lucy as she washes up on the shore of a nearby beach.
Absurdly Youthful Father: He and Yuka both adopt Mayu despite the fact that they're both university students and Mayu is 14.
The Dulcinea Effect: Only slightly, but Kouta is undeniably more inclined to go the extra distance to help out a girl in need.
Freaky Is Cool: He was the first person to think that Lucy's horns are cool.
Forgotten First Meeting: In actuality, Kouta met Lucy in his childhood after she killed her first victims. Unlike everyone else, he found her horns fascinating and forged a strong bond of friendship with her. However, he erased her from his memory after she brutally killed his father and sister right in front of him because he lied to her about his cousin's gender.
Heroic BSOD: He went through one when he was a child that lasted for a year, and caused him to repress some painful childhood memories.
I Will Wait for You: In the manga, after he kills Lucy/Nyu he goes to the place where he first met Lucy/Kaede the last day of the summer festival to wait for her every year, even though he knows she won't come. However, it's implied he manages to meet Lucy/Kaede and Nyu's reincarnations.
Kouta's cousin, who is around 19 years old and planning to attend the same university as Kouta. She moves in with him at the inn after having not seen him in many years. Having had a crush on Kouta since childhood, she still harbors strong feelings for him, and is openly jealous of Kouta's attention to Nyu, to the point of being irrational.Despite her brash tendencies, Yuka is geniunely as kind and caring as Kouta. Though she is hesitant and reserved, she is accepting of Kouta's decision to use their inn to shelter those in need.
Clingy Jealous Girl: In a grating manner as well. People tend to dislike her for this... while forgetting that Lucy can be even clingier. At least Yuka would NOT try to kill Lucy, whereas Lucy HAS used her vectors to push Yuka down and started her Roaring Rampage of Revenge because she was jealous of her.
Cool Big Sis: Arguably. She tries, bless her heart, but it doesn't necessarily work.
Woman Scorned: What? Kouta can't remember a promise due tohis sister and father getting violently murdered in front of him about twenty minutes after making said promise in some rather guilt-inducing circumstances? That bastard. Guess I have to kick his ass now.
This moment is somewhat justified in that she has no idea that he repressed his memories of that day, and she regrets her earlier reaction once she figures this out. Still...
A 14 year old girl, neglected by her mother and a victim of sexual abuse by her stepfather. She eventually runs away and is homeless at the start of the series, living on the beach and subsisting on bread crusts from a local bakery under the pretense that they are for the small puppy, Wanta, that accompanies her. She ends up living with Kohta and Yuka as her legal guardians, and later befriends Nana and tries to take her under her wing.
Abusive Parents: Her stepfather sexually abused her, and when she told her mother, the latter's reaction was to slap her and express jealousy of all the "attention" the former gave Mayu.
Attempted Rape: She was very nearly raped by the Unknown Man in the manga.
There's also when she hears about Lucy, she doesn't believe that the person she knew as Nyuu could be a sadistic killer and saves her during her 2nd fight with Bandou, after which Lucy tries to kill her.
Does Not Like Men/Hates Being Touched: She follows this to a degree; the manga implies that her traumatic experience with her stepfather has soured her on men in general, and finding Kouta in the bath groping Nyu doesn't help. Ironically, she appears to bond most closely with Bandou, who generally treats her like crap, yet saved her from the Unknown Man.
Interrupted Suicide: Possibly implied in the anime after running away from home. She was about to walk into the ocean, but stopped after she heard a puppy barking from the beach; she adopts the puppy and names it Wanta.
Plucky Girl: Mayu's got bravery to spare when she's pushed to it, as she shows when Bando tries to threaten her into revealing Nyu's location and she has the presence of mind to call him out to his face.
Also known as Number 7, she is a young Silpelit (Diclonius born from a human) girl who has the physical appearance of being 14 years old. Most Diclonius babies are euthanized at birth, but Nana was one of a handful kept alive for use as a test subject. As a result she has spent her entire life in the Diclonius research facility. Nana can be seen as the exact opposite of Lucy. While Lucy's default personality is serious and cold, Nana's is fragile, friendly, and kind. Nana's default personality is very similiar to Nyu and she also has an endearingly immature knowledge of the world.Nana was a stand-out subject among the Diclonius for being able to effortlessly repress her murderous instincts. Accordingly, she has never used her vectors to harm humans (or anything for that matter). Chief Kurama sees her as his daughter and cares very much for her. In the end, Nana and Kurama are regarded more instead as a couple with Nana referring to herself as his 'wife', as Kurama couldn't accept Nana as her daughter after his real daughter's death.
Adaptation Dye-Job: Her hair is purplish-blue in the manga, but is purplish-pink in the anime. Also her eyes were green rather than rose-pink.
Beware the Nice Ones: The few times said cutie-persona/psychological-defense-mechanism is broken through. During Nana & Bandou's first meeting on a moonlit beach, Bandou pushes her too far and she snaps on him, gaining the same dead look in her eyes that Lucy almost-constantly has and trying to kill him (and coming very close) until a .50-caliber bullet grazing her head knocks her back to her senses. Later in manga Chapter 74, The Unkown Man threatening Mayu and casually killing Number 28 right in front of Nana is enough to set her off again. Unfortunately, he blasts her before she can attack, taking her out of the fight.
Break the Cutie: An extremely clever inversion. It's explicitly stated that her "Cutie" persona is a psychological defense mechanism that she developed as a result of the universe's constant attempts to break her.
Can't Catch Up : Despite smarts in battle and ever-increasing savvy, she has a good showing but always gets curbstomped by opponents.
Cassandra Truth: Nana knows about Nyu's alternate personality Lucy, but no-one else believes her.
Lethal Chef: Given that she was raised in a lab, this isn't all too surprising (especially in the OVA: first, she burns some in a pan, then she's too enthusiastic cutting the lettuce, her prosthetic arm comes of and the knife nearly hits Mayu).
Mundane Luxury: To someone who was raised as a test subject like she was, a simple hot bath is a luxury.
My Name Is Inigo Montoya: Nana invokes this one constantly, usually just after she's been dealt a severe injury in combat, with "This doesn't hurt at all!" Also usually, the trope is horrifically subverted. Occasionally the reverse occurs, and Nana goes on to triumph in the encounter (albeit, usually, temporarily).
The Pollyanna: Admirably and heroically. Under ridiculously brutal circumstances that turned other Diclonii into killers. Choosing not to be one of the series' unstoppable killing machines, Nana maintains an unshakable positive outlook, anchored by her belief that everything will be OK when she can be with papa again.
Power Nullifier: She can use her vectors to temporarily disable other Diclonius's vectors.
Redemption Equals Life: If you count simply being a Diclonius as a state in dire need of redemption, Nana definitely qualifies. She is one of the kindest characters in the series, meaning she staunchly rejects the inherent, ingrained desire to eradicate all humans. She never takes a single life throughout both the anime and manga and is amply rewarded by being the only Diclonius to survive the manga.
Rocket Punch: Bando lured her on the beach, where she couldn't use anything as a projectile to throw at him. She used her artificial arm.
Younger than She Looks: Silpelits age at about double the rate of normal humans. Nana looks 14 and is really around seven years old.
A 15-17 year old girl who's Yuka's best friend and kohai, she aspires to become a famous opera singer like her late mother. However, her father does not approve of her dream, due to her being the only heir of his business, and also because she has a throat defect that will eventually make her lose her voice if she strains it too much.Due to Dad's rather... violent opposition of her dream, Nozomi developed a psychological trauma that makes her wet herself whenever she becomes too nervous. Despite this, she tries to get into a music high school, secretly training at the Maple Inn, which Yuka invited her to, during her free time and moving there permanently after getting accepted.
Adapted Out: Surprisingly few people are aware of Nozomi's existence. Despite being a main character, she was written out of the anime.
The chief of research of the Diclonius children in the research containment facility. He is also the surrogate father of Nana and biological father of Mariko. His wife died from when she tried to stop him from killing their daughter shortly after she gave birth to Mariko.Kurama was initially respected for his stern, no-nonsense attitude and his devotion to his job, in spite of the horrible atrocities that were being carried out. However, recent events cause Kurama's ironclad devotion to waver...
The Heavy: Why does Lucy do what she does? A friend (and her only one) took a bullet for her not knowing Lucy could deflect it so Lucy gave herself in to try and save the friend when Kurama offers to help if she comes quietly. Later Kurama flatly informs Lucy the friend died. She now wants to make him suffer.
Nominal Hero: In the anime. And in the manga for a bit bydisowning Nana.
Offing the Offspring: Kurama was initially in charge of terminating Diclonus children because he was the only one who could do it with no signs of regret. That is, until, his own daughter Mariko turns out to be one as well...
Parental Substitute: To Nana. However, at the end of the manga, Nana and Kurama are regarded more instead as a couple with Nana referring to herself as his 'wife', as Kurama couldn't accept Nana as her daughter after his real daughter's death.
Uriah Gambit: Sending Mariko in to fight Lucy was her idea. They were counting on Mariko winning, and even if she didn't, it wouldn't be a total loss. The Director accuses her of doing it to destroy parts of Kurama's past life so he'll let it go and move on. Her reasons for doing it are likely a combination of that, risking less human lives, and trying to divert suspicion from her Reverse Mole Status.
Adaptational Villainy: Manga Isobe was a troubled individual who tried to see the differences in Diclonius. His own niceness in fact is what got him killed. Anime Isobe not so much and comes off as another typical arrogant human.
An operative for the National Police Agency's Special Assault Team. Although he is technically human, he is as homicidal and apathetic to other people as the worst Diclonius are. He is incredibly skilled in combat and widely-regarded as a lethal and bloodthirsty soldier.
Adaptational Villainy : While a Jerk Ass, Bando in the manga was a badass with redeeming qualities to him and character development. The Anime decided to get rid of anything that could make Bando likable while adding more things to hate. The end result was a character who at his best was still worse than Manga Bando at his worst.
Bad Ass: Easily one of the most badass characters in the series. At least in the manga.
Badass Normal: Takes on several Diclonius including Lucy (twice) Nana and Mariko in the manga and holds his own using nothing but his skills and some heavy bullets and comes close to winning a few of them as well. Not even getting torn in half will stop him.
In the manga at least, he, after surviving multiple encounters with Dicolonii, learns how to dodge vectors.
He also nearly manages to beat Lucy in his 2nd fight with her, losing because the Unknown Man got in the way, and then because Mayu got in the way.
Also when facing the Unknown Man, he gets hit with one of his toxic spiked balls, and he endures the pain and rips it out despite being hooked into his skin with barbs.
Handicapped Badass: Blurred vision and a dysfunctional hand doesn't stop Bando from kicking extreme amounts of ass.
Took A Level In Bad Ass: While hardly weak before, Bando goes through some major changes in the manga after his first defeat by Lucy. His fights afterwards end with him utilizing the knowledge about Diclonius to his advantage, using several good tricks and remaining the only human to fight Lucy twice (and surviving) but actually holding the advantage over her in their second fight and nearly winning.
Crazy-Prepared: After getting his ass handed to him by Lucy early on. He completely cleaned up the beach in order to make sure Lucy had nothing to attack with, figured out her range of attack, and got modified Desert Eagles that fired rounds too heavy for Lucy to block or at close range knock away.
His crazy preparedness actually works against him in the manga where his attempt to blind Lucy with a flash grenade and tear gas worked against him when the bright flash kept most of the gas from entering her eyes. Though even she admits that if it wasn't for the Unknown Man, he'd have won.
He gives one to the Unknown Man, even though he had his crossbow and Bando didn't use a gun.
Having been prepared this time around, his second fight with Lucy in the manga ends with him stomping her face into the ground and nearly killing her twice. Unfortunately, people like to get in the way.
Disability Superpower: His prosthetic arm allowed him to remove a spiked ball from his body during fight with the Unknown Man.
Determinator: Grabs hold of a spiked metal ball, which is coated in agony-inducing toxin, out of his body and baseball-pitches it straight into the ass of the guy who shot him with it.
Half the Man He Used to Be: Loses his lower half and his left arm (and his right one, though he lost it earlier, and It had been replaced with a cybernetic arm). He recovers, but with a cybernetic lower half (and arms).
Pragmatic Villainy: Played With: he claims to clean up the beach because he's preparing for a fight with Lucy, and any and all trash can be used as a projectile. While that is true, he really does hate the litter and wants to keep the beach clean.
Sir Swears-a-Lot: Being the tough guy that he is, Bando curses far more than anyone else in the series. What makes it even more noticeable is that pretty much all the other main and secondary characters either don't swear at all or only do it once in a while.
Too Dumb to Live: Instead of just ventilating her, he chooses to play around with her first (a "duel"). In the ensuing fight he manages to accidentally awaken her "Lucy" persona and nearly gets killed.
The Unfettered: Anything is permissible so long as he has the opportunity to kill Lucy.
Would Hit a Girl: Most notably on his introductory scene, when he viciously backhanded a woman who made the mistake of approaching him from behind without warning. He outwardly threatens Mayu at one point by citing this trait: see below.
Would Hurt a Child: Despite having some standards, he is still more than willing to rough up Mayu and harrass Nana to get some information about Lucy. He also generally treats both girls like utter crap when he's not saving their lives from psychotic Diclonii like Mariko or Lucy or the even more psychotic Unknown Man.
The director of the Diclonius research facility. He is a repulsive, power-hungry man lacking any sense of morality and will do whatever it takes to achieve his goals. He is from a long line of Diclonius ancestry that has been watered down by inter-breeding with humans. As a result, he has no vectors and much smaller horns on his head. The aim of him and his son is, in part, to replenish their bloodline with the Diclonius they are experimenting on (of which Lucy was the first specimen capable of reproducing) and consequently become "kings" of the new race.
The Reveal: During his final confrontation with Lucy, it is made known that his family were never true Diclonius, merely Humans with a minor genetic mutation who invented legends and eugenic myths to cope with the persecution they faced in medieval times. The strife he caused our heroes and the world takes on a whole new light.
Utopia Justifies the Means: His goal is to destroy the human race and produce more Diclonii using Lucy, the only fertile female Diclonus, to replace them. He doesn't want to do this for any moral reason, though, but only so that in 100 or 200 years he can be worshipped as the god of the new species.
Idiot Ball: His plan to do the above involves making it so that all children except Lucy's are born slipelits, which are sterile, thereby reducing the Earth's population to one breeding pair (Lucy and himself) plus his male Diclonius son, which will almost certainly result in extinction of the Diclonii as well even if Lucy cooperates.
Also known as Number 35, she is a young Silpelit girl who is the biological daughter of Kurama. She is regarded as the most powerful of the Diclonius, possessing 33 vectors each with an approximate range of 11 meters in the anime (the number and range is much higher in the manga).After her mother's Death by Childbirth Mariko was imprisoned as an infant and raised inside a steel container with human contact consisting of nothing more than a scientist acting as a sort of foster mother through speakers and monitors. Her physical impairment is seen in her atrophied limbs as she moves around in a wheelchair. Despite the environment she was raised in, she is relatively well developed psychologically (for a given degree of "psychologically"), unlike Nana. She is extremely homicidal and sadistic, and enjoys torturing and dismembering her victims. However, her personality is not blatantly evil: she is only having fun, and the pleasure she gets from it is equivalent to a child playing with toys, not really noticing the differences.
Blank Slate: In the manga, after being flattened by a huge-ass missile, Mariko temporarily takes on a Nyu-esque persona, even down to only being able to say "Myu". She snaps back to normal when Lucy shows up.
Calling the Old Man Out: In a rather emotional scene in the manga, she berates Dr. Kurama for treating Nana as his daughter while allowing Mariko herself to be imprisoned in a dark and lonely room with almost zero human contact for her entire life.
Cloning Blues: Only in the manga. Has a terrifying effect on an already beyond-broken Kurama.
Heroic Sacrifice: In the manga, she charges a now-quite-unhinged Lucy and gets right next to her, allowing herself to be killed just in time for the explosives implanted in her to go off. The explosion knocks Lucy's horns off and causes her to regress to Nyu, thus saving Dr. Kurama from Lucy.
A researcher working alongside Professor Kakuzawa to find a vaccine for the Diclonius virus.She, along with Kouta, ends up seeing Professor Kakuzawa's mutilated body. She reports to Chief Kakuzawa what she's seen, but he doesn't intend to let her off scot-free, and threatens her with death lest she take up the rest of Professor Kakuzawa's research.In the anime, she's basically only there for comic relief, but in the manga, she plays an extremely important role as the story progresses on.
Chekhov's Gunman: Manga only. She ends up finally creating the Diclonius vaccine.
Genre Savvy: She recognizes that removing the mind-control device from the clones leads to dangerous things (See Nousou's entry). So when Arakawa does it, she quickly put it back in right before the clone went all Ax-Crazy
Not So Stoic: Stays behind to face certain death so Arakawa can escape with the Diclonius vaccine. Starts crying as soon as Arakawa is gone.
Shoot the Dog: When the security forces break into Kouta's house, they quickly, and violently subdue the occupants, with The Agent Pistol Whipping Kouta to prevent him from interfering, and warning him not to try anything. When Nozomi has her throat crushed, Kouta grabs a gun and threatens Nousou, the Agent Casually shoots him in the chest. The shooting was necessary to both save Nousou from disfigurement and possible death and to allow her to complete her mission, to save the world from the Diclonius faster, and without raising suspicion.
A minor manga-only character, a man clad in a black trenchcoat and wide-brimmed hat, with opaque sunglasses and greasy-looking hair. At first appears relatively civil, he soon reveals his true colors as one of most horrifically evil bastards, if not the most evil, in the entire series. A brutal, heartless, Hidan-level sadist, rapist, and all-around not very nice man, he delights in causing pain and suffering, especially in Diclonius and/or teenage girls.
Agony Beam: A low-tech variation, in the form of a crossbow that fires spiked metal spheres coated in a toxin that causes horrible, cripplingly agonizing pain to those it hits. Bites him in the ass - literally - during his fight with Bandou.
Abnormal Ammo: Let's just say that heavy spiked balls coated in potent toxins isn't exactly what you'd expect a crossbow to fire.
Ax-Crazy: Perhaps the craziest. And considering the likes of Bando and Lucy, that's saying something!
Expy: Basically the most repulsive parts of Alucard and Randall Flagg rolled into one humanoid mass; combining the looks and personality (Minus the Dirty Coward part) of Alucard and the sheer wickedness and depravity from Randall Flag.
Judging by his brief appearance, high memorability, and specialized weapons within the series, he could also be an Expy to Boba Fett, whose screen time in the first trilogy totaled all of ten minutes. Fett, though, is usually shown to have a deep sense of honor and morals, something Unknown Man obviously has no traces of at all.
Fan Nickname: For note, the above name is a fan term given to him. He never speaks his name, nor does anyone know his name.
A relatively minor manga-only character, 28 is mainly known for the nauseatingly horrific fate she suffers at the hands of the Unknown Man.
And I Must Scream/Fate Worse than Death/Cruel and Unusual Death: After suffering as a lab rat in the research facility all her life, she is raped by the Unknown Man, has everything below her torso amputated and her vocal chords removed, is trapped in a cramped container, which regularly injects a neurotoxic drug directly into her spine which keeps her in constant agony so that she can't use her vectors, and she only has 3 more hours to live. All so that the Unknown Man could use her as a radar to find Lucy. When he finds Nana instead, he kicks over her container in anger, which finally kills the poor girl. Earlier, when Nana had sensed her presence, she kept hearing a voice crying out, begging for someone to kill her. Sweet mother of God...