Kurobane Yukia

"I'm the class president. When it's time to be in control, I have an obligation to do so."

A first-year student and a classmate of Hayato and Mikuri. Giving an impression of being slim, but she is actually strong. She has black hair that reaches down to her waist and distinctive almond eyes.

Because she values discipline and is a strict type, she somewhat distances herself from her classmates, but she never refuses any request and she is in fact honest and sociable.

Her parents disappeared after getting into a debt, perhaps because of this reason, she has a strong passion when it comes to learning, while also being a self-supporting student. That is when, as a result of getting into a good part-time job that she discovers accidentally, she ends up being the "Black Snow", the leader of an evil organization, commanding the Arkaid Fighters and planning to carry out evil operations earnestly without fail.