Buccha serves the Greek goddess Aphrodite as a talking feline entity with anthropomorphic traits. Charged as Aphrodite's earthly emissary, his core mission involves hunting down, recruiting, and training five specific schoolgirls destined to become the Venus Warriors, Earth's defenders against the Inma Empire. He reveals their secret identities—Venus Pink, Venus Blue, Venus Green, Venus Red, and Venus Purple—and guides their transformation into warriors wielding supernatural abilities. Buccha identifies each girl by her unique Venus mark, proof of her divine selection.

Balancing dutiful devotion to Aphrodite's mission with occasional perverse tendencies, Buccha operates primarily at Golden Star Academy, the Venus Warriors' school. His role encompasses providing strategic counsel against the Inma Empire. A key revelation sees Buccha unmask the mysterious student Ken Kanagawa as Apollo Junior, exposing a hidden enemy lineage. Buccha serves as the narrative's lorekeeper, delivering exposition on the conflict's mythological roots: the Inma Empire's plot to resurrect Apollo, the god of lust, and conquer Earth. His interactions highlight the warriors' initial ignorance of their fate and his crucial role in uniting them. Buccha remains a steadfast supporting figure focused solely on facilitating the protagonists' journey, possessing no significant backstory or evolution beyond his assigned duties.