Yuko

Yuko (ユウコ) was a high school student, and member of the Devil Hunter Club alongside Asa Mitaka and Hirofumi Yoshida. She had a contract with the Justice Devil.

Appearance
Yuko is a high school girl of average height. She is a bit shorter than Asa. She has short, light-colored hair and wears dark-colored glasses.

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 white, knee-high socks. She also wears sneakers. When outside of school, she wears a blank shirt with a dark-colored jacket, light jeans that reach just slightly below the knees, and a pair of sandals.

The contract with the Justice Devil makes her capable of transforming herself into a thin and gaunt being with an uncovered brain and tentacles instead of legs.

Personality
On the surface, Yuko seems to be kind, warmhearted, and sociable. She quickly becomes friends with Asa Mitaka after partnering with her in the Devil Hunter club, noticing her distress at being shunned by classmates due to Bucky's death. She's very altruistic and friendly, being willing to give out her shoes to Asa so that she wouldn't have to walk home shoeless soon after meeting her, and got upset when Asa gave the shoes back.

She dreams of becoming a Devil Hunter to avenge her parents' death, and also because of the wealth it entails. Because of their parents' demise and lack of friends, she empathizes with Asa and grows close to her quickly. According to her, she's unable to understand people and has no friends because of that. She has the personal philosophy that her actions are always justified even if they are mistakes, as long as she thinks that her heart is in the right place.

Later on, it is revealed that Yuko's kind demeanor is a facade for a deranged personality with a twisted sense of justice. She's extremely cold-blooded and shows no remorse or concern over killing people she deems evil, all while continuing to smile and act warmly. Her warped sense of morality led her to making an illegal contract with the Justice Devil, murdering her neighbor, and attempting to "take care of" Asa's bullying problem. She also knows that Yoru has taken over asa and how they killed the class president. She knows all this because she can read minds as she is now in a contract with a devil.

Despite all this, she still believes herself to be best friends with Asa, and wants to fix her problems for her, even if that requires murder.

However, as implied when Yoru asked Yuko regarding the price for her contract with the Justice Devil, with her supposedly only receiving “a heart that shines with justice", Yuko’s extremely self-righteous behavior regarding her actions and of how she was “just” for murdering the bullies that harassed Asa due to her belief that word of her actions would spread across the nation and dissuade other bullies from bullying others, may be the result of her contract. With the actual price for her powers being implied to be that some part of her mind, such as her sense of right and wrong or her sense of Justice, being unknowingly altered and radicalized by the Justice Devil.

Devil Contracts
Justice Devil Contract: Yuko has a contract with the Justice Devil for an unknown price. The contract allows Yuko to read minds and transform to obtain an enhanced form.

Weapons
Her weapon of choice against Devils is a hatchet, similar to the one Denji used.

Etymology
Like most characters, Yuko's name is written in katakana instead of kanji. However, the name Yuko can have many meanings depending on the kanji it is written with. One writing, 夕子, means "evening child", which fits with Asa and Yoru's names meaning "morning" and "night".