Zero, a masked figure celebrated as the outer universe’s top racer, holds the prestigious title of Kaz’s greatest idol. Cloaked in secrecy, he first appears disguised as an elderly man, only to unveil his true identity during a climactic race in a pivotal episode. Believed to be Taiga’s older brother, his sudden role as Team Gurao’s instructor sparks visible friction, particularly with Taiga, intertwining familial ambiguity with team dynamics.

Rooted in competitive racing culture, Zero’s influence emerges across pivotal episodes, his reputation solidified when Kaz uncovers his significance during a late-night investigation into Team Gurao. Shedding his initial disguise, he transitions into a commanding instructor role, reshaping the team’s strategy while balancing mentorship with the internal strife his presence provokes.

Zero’s narrative weaves his dual identity as a legendary champion and a shadowed familial presence, his undefined bond with Taiga lingering beneath surface tensions. As instructor, his leadership tests Team Gurao through clashes over racing philosophies, though the spotlight remains on collective struggles rather than his personal history.

His portrayal remains consistent as a skilled yet enigmatic figure, with origins and motivations anchored solely in his racing mastery and unresolved familial ties.