Boiboi hails from Planet Supergrass, governed by magical royalty, and forms one half of the idol duo the Super Boins (alternately called the Busties) alongside Bosbos. Endowed with innate magical abilities, Boiboi deliberately seals these powers during racing competitions to uphold sportsmanship, ensuring fair play by relinquishing any supernatural advantage.

Competing as a team in the Redline race, the Super Boins pilot a transforming mecha-style vehicle that channels their home planet's technological aesthetics. This machine features rotating finger-mounted machine guns as its primary armament, though the duo consciously avoids deploying more advanced or arcane weaponry against competitors to maintain racing integrity.

During public engagements like interviews, Boiboi adopts a ditzy and indistinct persona, often appearing unfocused, which starkly contrasts with a more subdued and serious demeanor in private settings. Boiboi's personality remains largely undifferentiated from Bosbos, with no individual character development or unique personal backstory explored.

Throughout the primary storyline, Boiboi experiences no significant narrative evolution, functioning instead as part of a collective racing entity within the ensemble cast. The character appears exclusively in the main feature film, with no supplementary media appearances—such as the prequel OVA *Trava: Fist Planet* or other official spin-offs—and no expanded background details provided.