Mizukamiya captains the defense for Seishou Gakuen, where he's known as a defensive anchor. When Inazuma Japan formed for the Orion no Kokuin storyline, he joined their roster as a defender.
The show makes a point of his role in Episode 41 of Orion—Nosaka and Ichihoshi describe him as the team's "library," the guy who collects and retains all the tactical information, while Nosaka acts as the commander and Ichihoshi serves as the strategic advisor. Fans often note this establishes Mizukamiya as the thinking player of the trio, less flashy than his counterparts but essential to how the team operates.
Content compiled by AnimeList.moe from publicly available sources.
