Kaji is an eccentric, self-satisfied, easily excitable man with a strong obsession with science. Kaji rarely stops shouting out every word he utters, and when he doesn't, he lyrically praises his intelligence or ridicules others. Despite his eccentricity, Kaji is an experienced science enthusiast. Kaji is proud to be a future physics scientist who applies science to all aspects of his life through numerous "experiments".