Terushima has an undercut with spiky blond hair and a tiny tuft of hair that falls over his forehead. He has almond-colored eyes and short eyebrows the same color as his blonde hair. He also has a very athletic build. He is consistently shown to have his ears and tongue pierced. He is usually seen wearing black studs on his ears and a silver stud on his tongue.

Terushima is shown to be childish and extremely energetic. He's not one to take things seriously.