ayato suffers from a condition doesn't allow him to experience feelings. he doesn't feel emotions, empathy, or remorse. he doesn't feel guilt for harming others. however, he can feel pity at times. he knows what people consider to be "wrong", but he just doesn't care. he simply pretends to be normal and have normal feelings in-front of people to fit in. he only cares about gaining Yuzuka as he feels that she will make him feel complete, no matter who he’ll have to kill or to sabotage.