Kou is cheerful, direct and tends to jump into things headfirst without properly thinking them through. However, he has been shown to grow more mature as the series progresses. He is often misjudged as a bit of a delinquent or rude, but this is actually not the case. He is rash and loud but is also simultaneously very kind and caring. He makes a distinct effort to be polite, as seen when even though he was about to face off with Hanako upon their first meeting.