Jirō acts as the principal of Baramon High School, embodying an "outlaw" persona that mirrors teacher Teruhiko Saionji—a trait explicitly credited for drawing students to enroll. He presents as an adult with blond hair styled in short, wavy locks parted down the middle and a distinctive mustache. His consistent attire includes a suit, necktie, and sunglasses.

Beyond administrative tasks, Jirō directly engages the protagonist, offering practical guidance on game mechanics like saving progress and delivering romantic advice framed within gameplay systems. His signature phrase, "Do you want to save here?", punctuates these interactions and reinforces his role in facilitating the protagonist’s journey.