Asa Mitaka

Appearance Asa is a high school girl of average build and height. She has brown eyes that are usually pitch dark, though the irises become much brighter in some situations. Her hair is black and is sometimes colored with a purple tint. The hair reaches the middle of her back, and she wears it in two low twin tails, making it appear shorter. In the past, Asa wore her hair at shoulder length. She wears the same school uniform as the rest of the girls in her class. The uniform consists of a long-sleeved button up shirt worn beneath a pinafore style dress with a pleated skirt that extends below the knee, a bow at the collar, a wide belt at the waist, and black, knee-high socks. She also wears sneakers.

Personality Asa is initially a quiet and unsociable girl. She dislikes her classmates, frequently wishing they would drop dead and spurning any offers of friendship.[1] She has a very negative outlook on the world, other humans and Devils and tends to assume the worst of others. She is however very fond of cats and would rather kill a human.[2] Asa later admits to herself that her mean-spirited altitude towards her peers was a result of jealousy. She also suffers from low self-esteem, considers herself a clumsy individual. Despite this Asa can be falsely self-assured and overconfident such as her belief that she would easily be able to seduce Denji. Asa can be extremely socially inept, such as believing that boring Denji with ocean facts on their aquarium date would be a great way to win his affection. Her moral compass is somewhat artificial, as she is often more worried about the consequences certain actions carry instead of the actions themselves. For example, she doesn't feel bad about having accidentally killed Bucky but feels bad because of the looks her peers gave her. This also gets reaffirmed in the aquarium, where Asa refuses to kill Denji after being trapped and starved for several days. She doesn't do so because it goes against her morals but because she does not know what is right and wrong and constantly tries to avoid making mistakes. Mitaka's fairly altruistic, putting herself in harm's way to save others even when she is afraid. Asa would be willing to endure bad situations if only she were to suffer, but refuses to drag others with her. After being saved by Chainsaw Man, she realizes she's glad she's not dead and is no longer as negative towards other humans or towards all Devils. However this was short lived as she easily fell back into depression and even attempted suicide during the Falling Devil fight. Asa doesn't cope well with failure or when things don't go her way. Because of past experiences she is extremely afraid of making mistakes. Once she does make a mistake she usually gets very angry blaming everyone around her except herself.[3] Though after calming down she'll break down in self-deprecating rants.[4][5] She seeks validation as shown by her internal monologue during her meeting with Yoshida or breaking down and seeking comfort from Yoru despite being afraid and screaming at her mere moments prior. She has trust issues yet is afraid of loneliness but is also afraid of trying to approach someone as she believes she'll mess up and end up lonely again. This puts her in a cognitive dissonance as she puts it where she's afraid of both solitude and companionship. She has a negative opinion on sexual intercourse. When Chainsaw Man reveals his main drive in life is to have sex, she openly expresses disgust. She believes people only have sex when there's nothing better to do, and the thought of mixing her saliva and sweat with someone else sickens her. Despite being previously shown to be very timid and frightful during devil encounters; motivated by her desire to "save" Chainsaw Man she quickly becomes a proficient devil hunter, seemingly having managed to become braver and more confident than before.

Abilities Supernatural Abilities War Devil Possession: After having her body and half of her brain taken over by the War Devil, while still retaining her consciousness, Asa is able to tap into the powers of the War Devil. Weapons Creation As a host of the War Devil, Asa has the power to make anything that belongs to her into a weapon. This includes both objects and living beings. In order to activate the weapon transformation, Asa must touch what belongs to her and call out it's weapon name. The strength of the weapon is proportional to the amount of guilt Yoru and/or Asa feel about creating said weapon. There is no objective measure of when something belongs to Asa or Yoru, it relies entirely on their own perception and logic as shown when Asa paid 1 million yen to "buy" an entire aquarium and despite it being nowhere near enough money, it still qualified to be turned into a weapon. So far the only types of weapons created have been either melee weapons such as swords and spears or explosives such as a hand grenade. It is unknown whether Asa can create more advanced weapons such as modern firearms. Object Weapons Creation: Asa is able to turn any object that belongs to her into a weapon. An object that belongs to her can either be something she bought or took. Object weapons created by Asa thus far are: Super-Strong Uniform Sword (制せい服ふく強つよ強つよ剣けん, Seifuku Tsuyo-Tsuyo Ken?): A rectangular shaped sword made from Asa’s uniform. Due to the sentimental value of it, as it was given to Asa by her late mother, the sword is extremely powerful. It was able to slice and dice Yuko in her Devil form into dozens of small pieces in an instant despite the sword being knocked away. Despite its power, the sword is extremely brittle and was destroyed in the school's collapse.Aquarium Spear (水族館アクアリウム槍スピア, Akuariumu Supia?): A two-pronged spear approximately two meters long, made from the aquarium building Asa purchased for one million yen. The tips of the spear are fish shaped and the handle of the spear drips water. Once impaled into a target, the full contents of the aquarium explode out of the victims wound. This weapon is especially powerful due to the guilt Asa felt about destroying an entire aquarium, and was strong enough to instantly kill the reincarnated Eternity Devil who imprisoned her in the aquarium. Super Chainsaw Man Motorcycle (スーパーチェーンソーバイク, Sūpā Chēnsōman Baiku?): A motorcycle made from the motorbike stolen from a man driving on the street. This motorcycle possesses a very large chainsaw which is positioned horizontally between the two wheels and extends for a few meters out the front. Its other notable features are a vastly upgraded engine and a black livery. The bike also appears to be able to drive on its own, as it speeds away right after the transformation despite Denji being incapable of operating one. This combat vehicle is very powerful due to the guilt she felt about stealing a motorcycle from a random citizen. It has proven to be extraordinarily durable, being able to easily survive an entire apartment building being thrown onto it. Unspecifed strong weapon: Sometime after joining the Chainsaw Man Church Asa created a sword to hunt devils. The sword consists of of a black J-shapped crossguard covered in spikes and a seemingly detached levitating triangular blade. She used this weapon to kill at least 10 devils suggesting it's fairly powerful. It somewhat resembles one half of a scissor in it's apperance. Flesh Weapon Creation: Asa is able to make anyone she "owns", including humans, Devils and Fiends, into a variety of deadly weapons almost instantaneously simply by touching them. This does not appear to immediately kill the human, as they can still scream in agony. In order to make a flesh weapon, Asa must either: take a limb from the victim which she can then turn into a weapon, kill them and turn their remains into weapons, or form a relationship with someone wherein they "belong to her". She can also make weapons from her own body parts which will violently tear themselves off her if she does so. Flesh weapons created by Asa so far are: Nail Knife (爪つめナイフ, Tsume Naifu?): A simple dagger made from Asa's own fingernail, which violently ripped itself off. The knife is about a foot long, has a finger-shaped handle, an s-shape crossguard and a straight blade. It appears to bear no special properties much like a regular knife. Skill Set Swordsmanship: Asa carries a katana as her weapon of choice, suggesting that she is capable of handling it. She is later shown using some kind of sword as her weapon of choice.

She is a high school student who became the host of the War Devil, Yoru, making her the inhabitance of the War Fiend (戦せん争そうの魔ま人じん, Sensō no Majin?), though she still retains her human personality when Yoru allows her control, making her a rare case of a living Fiend host.