Rin is a surprisingly tall teenager with a slim but powerful build. He has black hair with a bang going across his face more in his right eye than left eye, slim teal eyes, and distinct eyelashes that he shares with his brother Sae Itoshi. As a young boy, Rin was very innocent and in awe of his brother, Sae, wanting nothing more than to become cool and strong like him. Due to his fallout with his brother, he has become cold, blunt, and overly serious.