Baikinman hails from Germ World, serving as the story's core villain. His name, meaning "Germ Man," reveals his essential nature and driving purpose: to destroy the hero and remake the planet into a new Germ World. He relies on tricks, theft, and bullying the weak.

Born at the exact moment as the hero, he embodies a constant opposing force, representing a fundamental moral duality. To achieve his goals, he crafts elaborate schemes and builds specialized machines targeting the hero's weaknesses.

His crucial weakness is soap; exposure causes him to plummet to fly-size, forcing retreat or defeat. His reach extends beyond direct conflict, notably through manipulating Rollpanna. He implanted a blue heart of evil within her, triggering malice upon seeing the hero, contrasting her inherent red heart of goodness activated by her sister Melonpanna.

Though often satisfied with minor mischief, his relentless efforts to undermine justice and spread germ-based corruption define him. His character design and antagonistic role influenced Team Rocket's creation in Pokémon.