The Death Kwon Do Instructor, Sensai, is an overweight martial arts instructor who teaches the fighting style of Death Kwon Do, using a notebook full of drawings as his technique book. He is voiced by Sam Marin. He often reacts to bad news by shouting "NOOOOO!". He only appears with a few lines/quotes. In "Death Kwon Do-Livery," he is revealed to have an apprentice, Jerry-San. He returned in the episode "Sandwich of Death" as the deli owner.