Asa Mitaka

General: Asa Mitaka is the main protagonist of the Academy Saga and a high school student. She possesses a unique status as the host of the War Devil, Yoru, which makes her a rare living Fiend host. Despite this connection, Asa retains her human personality when she has control over the War Fiend. She attends Fourth East High School and shares a desire to pursue a relationship with Denji, another student.

Appearance: Asa is an average-built high school girl with brown eyes that usually appear pitch dark, but can become brighter in certain situations. Her black hair reaches the middle of her back and is occasionally tinted with a purple hue. She typically styles her hair in low twin tails, giving the illusion of shorter hair. In the past, she wore her hair at shoulder length. Asa wears the standard school uniform, consisting of a long-sleeved button-up shirt, a pinafore-style dress with a pleated skirt that extends below the knee, a collar bow, a wide waist belt, knee-high black socks, and sneakers. Her underwear comprises a basic white bra and panties with a bow.

Personality: Initially, Asa is portrayed as a quiet and unsociable girl who harbors negative feelings towards her classmates, often wishing ill upon them and rejecting offers of friendship. She possesses a pessimistic outlook on the world, humans, and Devils, assuming the worst of others. However, Asa has a fondness for cats and prefers the company of animals over humans. She eventually realizes that her mean-spirited attitude towards her peers stems from jealousy. Asa also struggles with low self-esteem and considers herself clumsy. Paradoxically, she can display false confidence and overconfidence, such as believing she can easily seduce Denji. Asa also exhibits social ineptitude, as seen when she believes sharing ocean facts during an aquarium date with Denji would win his affection.

Asa's moral compass appears somewhat artificial, as she is primarily concerned with the consequences of her actions rather than the actions themselves. For instance, she doesn't feel remorse for accidentally killing Bucky but feels guilty due to the judgmental looks from her peers. This pattern continues in the aquarium incident when Asa refuses to kill Denji, not because it goes against her morals, but because she fears making mistakes and lacks a clear understanding of right and wrong.

Despite her flaws, Asa possesses a somewhat altruistic nature and is willing to put herself in harm's way to save others, even when afraid. She would endure difficult situations alone rather than involving others. After being rescued by Chainsaw Man, she realizes she's grateful to be alive and becomes less negative towards humans and Devils. However, this newfound positivity is short-lived, as Asa falls back into depression and even attempts suicide during the Falling Devil fight.

Asa struggles to cope with failure and instances when things don't go her way. Her fear of making mistakes stems from past experiences. When she does make a mistake, she often becomes angry, blaming others around her before eventually breaking down in self-deprecating rants. She seeks validation, as evidenced by her internal monologue during her meeting with Yoshida or seeking comfort from Yoru despite initially screaming at her in fear.

Trust issues plague Asa, and she fears both loneliness and approaching others, believing she will mess up and end up alone again. This creates a cognitive dissonance within her, as she simultaneously fears solitude and companionship.

Regarding sexual intercourse, Asa holds a negative opinion. She openly expresses disgust when Chainsaw Man reveals his main drive in life is to have sex. She believes people only engage in sexual activities when there is nothing better to do, and the idea of sharing saliva and sweat with someone else sickens her.

Relationships:

Yoru: Yoru is the War Devil who resurrected and inhabits Asa's body, turning her into the War Fiend. Although Yoru saved Asa's life, she doesn't feel thankful towards Yoru like she does towards Chainsaw Man. Asa and Yoru share one body, but they often clash due to their differing approaches to conflicts. Asa tries to assert her own will and often challenges Yoru's methods. While Asa grows used to chatting with Yoru, she still feels uncomfortable and deeply mistrusts her. Asa fears getting closer to Yoru and seeks validation from her despite their strained relationship.

Yuko: Asa met Yuko during their school's Devil Hunter Club tryout and initially hesitated to befriend her. However, Yuko's kindness and belief in doing what's right had a significant impact on Asa. Asa came to appreciate spending time with Yuko and adopted her belief system. Asa risked her own life to save Yuko when faced with the choice of turning her into a weapon. Even after Yuko's transformation and actions as a monster, Asa still showed reluctance to fight her and chose to bring her back to life.

Denji: Asa and Denji initially had conflicting attitudes and friction between them. Asa doubted Denji's identity as Chainsaw Man and called him a loser. However, their relationship improved after being trapped in an aquarium together. They began to bond and Denji found Asa fun to be around. Asa started developing feelings for Denji, which were confirmed by Yoru. Despite some misunderstandings and conflicts, Asa admired Denji's resolve and appreciated his impact on her life. She hesitated to finish him off and instead chose to save him, demonstrating her admiration and care for him.

Yoshida: Asa and Yoshida attended the same school but didn't interact much. Yoru briefly took control of Asa and asked Yoshida out to turn him into a weapon, but he declined. Asa wondered if Yoshida liked her when he spent time with her. As they shared some values, Asa became excited, hoping to be asked out. However, Yoshida disappointed her by telling her to stay away from Denji without further explanation, leading to her feeling more depressed.

Abilities:

War Devil Possession: Asa gained the ability to tap into the powers of the War Devil after becoming its host. She retains her consciousness while the War Devil inhabits her body. This possession grants her various supernatural abilities.

Physical Prowess: Asa's speed, strength, and durability are significantly enhanced by the War Devil possession. She can move quickly, dodge attacks, and exhibit superhuman strength, such as pulling off a person's head with great force and carrying heavy objects easily. Additionally, her enhanced durability allows her to survive events like a building collapsing on top of her with no outward injuries.

Weapons Creation: As the host of the War Devil, Asa has the power to turn anything that belongs to her into a weapon. This includes objects and living beings. By touching what belongs to her and calling out its weapon name, she can transform it into a weapon. The strength of the weapon depends on the guilt felt by Asa and Yoru about creating it. Asa can create melee weapons like swords and spears, as well as explosives such as hand grenades. It remains unclear if she can create more advanced weapons like modern firearms. The perception and logic of Asa and Yoru determine what qualifies as something belonging to Asa.