Kai has blonde hair and red eyes. One unique portrait of this character is that he possesses a metal claw on his right hand. He is one of the "evil guys" that show up in Let´s & Go!!, unlike others, he was forced to be mean by Dr.Ogami. He has a mysterious aura around him but later in the series he turns out to be an ally for the Seiba brothers. His racing car is Beak Spider Zebra