Cap serves as a key member of the Arahabaki resistance group, operating alongside fellow otaku mechanics Megane and Pocha. The trio focuses on securing otaku-centric goods and overseeing technical systems vital to the group’s activities. During a critical mission to the Akihabara Black Market, Cap is lured away by rare collectibles, resulting in separation from the team—a pattern revealing their occasional prioritization of personal obsessions over mission urgency. This trait aligns with Arahabaki’s overarching goal of protecting otaku heritage amid their resistance efforts.

Tasked with logistics, Cap sources equipment and supports operations involving the group’s mecha technology. Collaborative exchanges with members like Hosomichi and Balzac illustrate cohesive group dynamics, though their personal histories and deeper individual arcs remain unelaborated in existing narratives.