Sr Bigode, alias GamiGami Devil or GamiGami Maou, is a technical genius dwelling within a self-constructed "junk castle" situated in a swamp, accompanied by humanlike robots. His primary drive involves repeated schemes to seize control of the Popolocrois kingdom, consistently thwarted by protagonists who view his efforts as minor threats due to their recurring failures. He possesses limited literacy, writing at a child's level, yet counterbalances this with exceptional talent in robotics and mechanical innovation. His personality displays a slightly unbalanced demeanor and a flair for dramatic, over-the-top villainy, epitomized by his signature exclamation "Otoko no ROMAAAAAN!!". As a member of the royal family of the Bryonia Kingdom, he shares the same age as King Paulo, explaining his persistent ambition for rulership. Novelizations covering his adolescence detail his kobold heritage and distinctive mustache. One notable scheme accidentally opens a dimensional portal, summoning the wind-kind girl Hyuu and her guardians to Popolocrois. He later achieves temporary success by relocating his castle to the kingdom, though this victory proves short-lived. A love spell induces his infatuation with Hyuu, creating a recurring subplot despite her indifference. His domains feature advanced technology and modern aesthetics, starkly contrasting with Popolocrois's medieval fantasy setting and highlighting his role as an agent of industrial chaos within the predominantly natural and magical world. While largely maintaining a comedic antagonist role, subtle dimensions emerge through his royal background and the occasional unintended consequences of his inventions, which sometimes drive significant plot developments beyond mere villainy.