Dennetsuman is an assassin robot created and deployed by the criminal organization BAD in the series Robot Keiji. His design is themed around an electric heating coil, and he serves as the primary antagonist of the twenty-first episode, titled The Terrifying Electrothermal Man: Mother Blows Up and Sinks!!. His name, Dennetsuman, directly reflects his electrothermal nature. He was sent by BAD to attack the Miki family as punishment for their defiance of the organization. Beyond this mission, little is revealed about his personality or personal motivations, as he appears only in a single episode and acts strictly on BAD's orders. His role in the story is to confront Robot Detective K and attempt to destroy the Mother fortress, a key asset for the hero. His notable ability is his electrothermal power, which allows him to generate and weaponize intense heat, posing a serious threat to his opponents. Dennetsuman does not undergo any character development, as he is eliminated by the end of his episode. His key relationships are limited to serving BAD and opposing K and the police unit.