Kazutaka Seki, nicknamed "Chobi," forms one-third of the notorious "terrible trio" alongside Kenichi Minezaki and Saneyasu Mushanokoji. Sporting a shaved head marked by a distinctive circular bald patch on the right side and pronounced buck teeth, he stands out with his casual yet striking wardrobe of striped shirts and shorts. His compact frame buzzes with relentless energy, fueling a penchant for pranks and antics that cement his role as the group’s primary instigator.

A dedicated member of the school soccer club, Chobi demonstrates notable prowess on the field, rarely seen without a soccer ball tucked under his arm. His nimble footwork and rapid sprints transform him into a tactical asset during clashes, where he distracts adversaries with feints and lightning-fast retreats. Though primarily aiding core operatives from the sidelines, his talent for weaving comedic levity into high-stakes scenarios pairs with strategically timed diversions to bolster the team’s cohesion and effectiveness.