Dokin-chan, a germ-like alien, serves as a secondary antagonist in collaborative schemes with Baikinman. Her design features an orange-red body, pink shoes, white-gloved hands, vivid green eyes, small red cheeks, and a single antenna, complemented by a long tail common among germ characters. Selfish and greedy, she frequently asserts dominance over Baikinman, demanding he retrieve objects or hostages. Yet her harsh exterior cracks to reveal sporadic kindness, driven by unrequited affection for Shokupanman. She obsessively decorates her surroundings with his likeness and fantasizes about shared moments, even orchestrating elaborate attempts to win his favor.

Her rivalry with younger sister Kokin-chan centers on competing for Shokupanman’s attention, sparking clashes over possessions tied to him, though fleeting moments of sisterly connection emerge. Equipped with a multifunctional staff capable of resizing objects—a tool gradually used less frequently—she also pilots a pink UFO, primarily deploying it for transport or hostage relocation rather than direct combat.

While recurring as a troublemaker, Dokin-chan intermittently prioritizes Shokupanman’s safety over mischief, exposing vulnerabilities like retreating from overpowering threats. Her motivations weave personal longing into antagonistic acts, blending self-interest with occasional compassion, and her dynamic with Baikinman balances abrasive commands with an unspoken, grudging loyalty.