Korekiyo is an aloof and somewhat creepy person, but he is also very cool-headed and intelligent. He has the experience of having met to a huge variety of human beings for his cultural anthropology research and because of that, he can keep himself composed even under the confinement circumstances and believes in facing things with calm and rational approach rather than an emotional one. Korekiyo usually speaks in calm and polite manner, but he nevertheless comes across rather off.