Tooru has light brown hair and brown eyes. He also has a mole under his right eye (which is why Mizuki sometimes calls him "Mole" or "Mole Boy").
Tooru is a voice actor. He is a hard worker, but sometimes can cause trouble when he feels outshined by Mizuki. He sees Mizuki as his rival and gets mad when Mizuki doesn't show effort towards voice acting. He is often called by other people "Mr. Shadow hidden behind Aqua."
He thinks Mizuki and Shiro are dating. He later develops feelings for Shiro, but is too scared of Mizuki to do anything about them.
He doesn’t like Mizuki and sees him as a rival because Tooru debuted at the same time as AQUA but was outshined by Mizuki.