In general, Kou is described as a cold and distant person. He has difficulty expressing his own feelings and prefers to remain silent rather than say what is really on his mind. At the same time, he is very intelligent and clever, having the ability to understand complex subjects. He is responsible and has a pragmatic mindset, which makes him a trustworthy person. But his cold and harsh personality can be difficult to deal with, he is someone who is difficult to build bonds with.