Tamiya was the original leader of the Litchi Hikari Club, which he founded with his two best friends, Kaneda and Dafu. The club was later overtaken by Zera, who Tamiya disapproves of for his cruel means of ruling. Tamiya is level-headed and thinks of others before himself. He also has a little sister, named Tamako.

His character is named after Jirou Tamiya, a Japanese actor and television host.