Korekiyo usually speaks in calm and polite manner, but he nevertheless comes across rather off and makes others uncomfortable due to his strange and sometimes morbid thinking. While he is most of the time very collected, he occasionally gets very excited. Korekiyo is an aloof and somewhat creepy person, but he is also very cool-headed and intelligent. It is heavily implied his older sister assaulted him, leaving him traumatized. He’s very handsome.