Dokin-chan, an orange-red germ alien and secondary antagonist, operates as Baikinman’s mischievous partner in crime. Her design features green eyes, pink shoes, white hands, a lone antenna, and a lengthy tail akin to fellow germ beings. She embodies a brash, entitled demeanor, frequently ordering Baikinman to cater to her whims, yet glimpses of hidden empathy surface sporadically.

Her defining obsession is an unreciprocated fixation on Shokupanman, a hero with a bread-loaf head. This infatuation drives absurdly dramatic pursuits: hoarding Shokupanman-themed collectibles, crafting delusional romantic fantasies, and orchestrating over-the-top plans to capture his heart. These antics routinely backfire humorously—traps ensnare unintended targets, gadgets malfunction, and schemes spiral into chaos.

A rivalry simmers with her younger sister, Kokin-chan, as both vie for Shokupanman’s attention, sparking petty clashes. Despite their friction, they reluctantly unite for shared goals. Dokin-chan’s bond with Baikinman teeters between manipulation and faint camaraderie, leveraging his isolation while sporadically revealing muted concern.

Originally equipped with a staff that manipulated object sizes, her reliance on the tool waned over time. She commands a pink UFO for travel or hostage containment, reflecting her origins in Germ World, where her species navigates vintage-styled flying saucers. Though her homeland’s lore remains underexplored, her role as a lighthearted troublemaker persists.

While primarily an antagonist, rare episodes depict her engaging in unexpected alliances, softening her edge during cooperative ventures. Her escapades prioritize slapstick mischief over genuine villainy, mirroring the series’ playful tone.