Chinko, known as "Drill Dick," is an inmate at a lunar prison facility, distinguished by a prominent industrial drill replacing his genitalia—a feature central to his interactions and combat tactics. Openly gay, he persistently pursues unreciprocated sexual encounters with Retro, a protagonist, blending humor with provocation. During Retro and Pandy’s prison escape, he aids them by wielding his drill as a weapon, frequently assaulting adversaries’ sensitive regions. His loyalty surfaces in clashes with guards, where he prioritizes the protagonists’ survival.

Originating from the prison’s cloning experiments, he is labeled "genetic garbage," a product of flawed mutations designed to create expendable inmates. No pre-incarceration history is disclosed. His arc concludes during a skirmish with guard 777, who fatally crushes his torso. Postmortem, a semen-like fluid discharges from his drill, aligning with the narrative’s darkly comedic, irreverent style. The character’s blend of anatomical absurdity and overt sexual bravado serves to amplify shock-driven humor within the story.