Bacillus, a green, slime-coated parasitic alien, thrives as a consumptive predator. His amorphous form allows him to infiltrate and assimilate hosts—humans, animals, or other beings—seizing their physical traits, skills, and autonomy. Driven by an endless hunger, he ravages indiscriminately, absorbing victims to fuel his shape-shifting dominance. The Federation marks him as a top-priority fugitive for his role in smuggling Ryunka, a cataclysmic entity, to Earth alongside Geega, his underworld superior. Bacillus’s parasitic conquests blur identity and agency, manifesting visceral body horror as he invades, replaces, and erodes individuality. His confrontations with Federation enforcer Birdy epitomize the clash between order and his anarchic consumption, framing him as both a biological and existential threat to galactic stability.