Kokichi is a young man with an innocent look and a rather refined face. He has a short stature, a thin build, and very pale skin. He has purple eyes and moderately long, wavy blackish purple hair, with the tips dyed a brighter purple. In the official art book, it is stated that he does not seem to care about his hair and the hairstyle is a result of him playing with it—however, he does sometimes make use of the shadows his bangs form to make himself look evil.