Shiro appears as a minor character and an unofficial Host of the Ouran Host Club. It may be speculated that this is because of his age, which places him as a 5th-year at the elementary level.

He appeared in episode 6 as the elementary host. Renge categorized him as the naughty type. He resembles Tamaki as a child. Shirou declares that he's serious about becoming a host—there's no time left—and he needs to learn how to make women happy. But what he really wants is to make Kamishiro Hina happy before she moves away.