Ayanokoji Kiyotaka / Cold Genius.

Almost everything about his life before the entrance exams is unknown. However, during a flashback, Ayanokoji revealed himself to be part of a group of children involved with a mysterious organization called the White Room, led by his father. During this memory, he maintained his stoic expression, remaining impassive even when a child to his left had difficulty breathing and fainted for unknown reasons.[1] There was also a moment when his father approached and said that those who do not reveal their talents are fools.[2] During that time, Ayanokoji underwent various training regimens, presumably including martial arts, while also passing challenging and rigorous written exams, giving him extreme physical ability and mental prowess. Time passed, more children began to suffer like the child at the beginning, eventually leaving him as the sole survivor of the group. His training led him to believe that all humans are merely tools and that victory is all that matters in the world. From this perspective, he is determined that, no matter the cost or what happens, he will achieve his goal of winning.

He grew up being observed by Hanna while undergoing various tests for his intelligence, to prove he was a perfect genius, which deprived him of emotions and everything else. He didn't know that the real reason he was observed by Hanna and her father, a close friend of Ayanokoji's father, was because her father wanted her to bring back Ayanokoji's humanity, to make him feel emotions again when they grew up. Currently, Ayanokoji is 19 and Hanna is 17. Hanna is a kind of anti-heroine and one of the class mentors, being in Class A, the class where only elite geniuses are, and is the class representative of Class 1-A. She seems to have a "let the tide flow" attitude, accepting most situations without protest. Although she expresses aversion to boring situations, Hanna has an innovative perspective on things that is more conservative in posture. Hanna has long purple hair and pinkish eyes; she is very short, 1.46 meters tall, much shorter and more fragile than anyone else in the school. But her physical weakness is nothing compared to her genius mentality. After all, she is determined to make Ayanokoji feel something or show that he is only a created genius, while she is a natural and perfect genius. Hanna is super popular, kind, and sociable, but that's only outwardly. Unlike Ayanokoji, who doesn't feel or express emotions, Hanna expresses them but doesn't feel them, being very cautious and brilliant.