Azusa is a clingy, faint-hearted do-S (extreme sadist) and do-M ( extreme masochist). Because he likes being injured, he may even harm himself. Though his manner of speech and attitude are timid, he'll always do what he wants to his heart's content. He talks very slowly.
Azusa has a twisted yet visible sense of right and wrong. He often tells his brothers not to fight. He apologizes to the heroine when he startles her, deceives her, or feels he must do something against her wishes. Azusa also admits he knows lying is wrong, but he will lie to make someone happy, to earn a punishment, or to fulfill his older brothers’ orders. When he hurts the heroine by cutting her, sucking her blood, or forcing spicy food on her, it is usually because he's trying to help or to share something he enjoys. He believes the physical pain is the greatest pleasure that makes someone feel alive and forget the pains of the heart, and that is why he wants to hurt her, to give her the same comfort and pleasure he gets by that pain.
He also finds the leaving of permanent scars over the body as something very intimate, and since he heals, he needs to "refresh" his old scars he considers his friends (Justin, Christina, Melisa named after his bullies in his childhood).
