Pantheroid is a fictional enemy character from Koutetsu Jeeg, one of the robot monsters sent by the forces opposing the protagonist. He appears as a dangerous mechanized beast with panther-like traits, designed to fight Koutetsu Jeeg and threaten humanity. In the series, Pantheroid serves as a monster-of-the-week style antagonist, embodying the recurring mechanical threats faced by Hiroshi Shiba and his allies. The character contributes to the show’s action and monster battle format.