Dark Kai's appearance is similar to a normal Kai, except he has dark purple skin and red eyes with black hair. In his Ultimate Transformation state, his skin turns black and his size increases immensely. He wears a black robe which shrouds his body, but is ripped off when he transforms to his Ultimate form. His original appearance was that of a normal Kai, execpt he had a bulk that is not seen on the generations after his. When he first appears, he is see with a long blade on his back, but he later loses this in the battle against Goku and Vegeta.