Gundham has an eccentric and somewhat dark personality, his delusions of self-grandeur likely stemming from an inferiority complex and chuunibyou syndrome. He claims that he was gifted with evil powers of the underworld. He often rambles about his status as "The Supreme Overlord of Ice" and his interest in the dark arts, alchemy, and astral levels. He cares about his animals, and he understands them better than he understands people. He has four hamsters which he calls his dark devas.