Gundham has an eccentric and somewhat dark personality. He often claims that he has been blessed with the evil powers of the underworld, and refers to everyone else as 'pathetic human beings'. Gundham is often lost in his own little world, usually paying more attention to himself or his hamsters than the things that are going on around him, such as in Chapter 1 when he failed to investigate after the murder and putting his lost Hell Hound Earring at a higher priority. He may also have an interest or knowledge of alchemy.