Age: 17

Yuuya is a mysterious character at first, indicating nothing of his true personality. He initially appears to be a protective and strong ally, as well as sophisticated and classy with his Japanese pronouns, language, and manners, though occasionally coming across as somewhat blunt and apathetic.

Underneath this façade, however, Yuuya is a sociopath in the truest sense, withholding no understanding or comprehension of morality, affection, social interaction, or the value of life. Violent from childhood, his acts ranged from trying to beat a student to death in elementary school to mutilating animals. Many of his feelings of disdain for others stem from his cynical perception of truth, firmly believing that everyone else was hiding behind a mask, preventing him from seeing their 'true' personality, and effectively lying to him, something he took great offense to. Eventually, Yuuya became obsessed with this idea, and became convinced that only death would reveal a person's true side. Thus, he lusted to kill those around him. Due to his lack of understanding of others and the world, he created a false front that he projected out to the world after childhood, acting as a loner who preferred to sit on the sidelines and observe while he studied others and their interactions, ironically committing the same type of deception that he himself loathed. In reality extremely egocentric, if people truly wish to be involved with him, then he expects them to put him at the center of things, and 'care' about him in the way that his family 'didn't'. 

Hand in hand with this, Yuuya displays an almost absurd amount of arrogance, a trait that, unlike much of his mind's inner workings, he doesn't seem to bother to hid from most, and even flaunts it in some cases. Having been repeatedly told he'll grow up alone due to his sadistic ways, Yuuya shrugs this off on the grounds that if he is second to none, being alone won't matter. This way of thinking evolved into a nearly delusional mindset, with Yuuya not only thinking he couldn't lose, but firmly believing with every fibre of his being that such an event is flat out impossible.