Korekiyo is aloof and somewhat disturbing, but he is also very cool-headed and intelligent. Having met a wide variety of human beings during his experience in cultural anthropology fieldwork, he can keep himself composed even under confinement circumstances and believes in facing things with a calm and rational approach rather than an emotional one. He tends to stay calmer than the others during dire situations. As for him, it's an opportunity to observe. He speaks very eloquently as well.