Rin is a 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 long eyelashes. He has a brother, Itoshi Sae. He is a contender in Blue Lock - a football project with the intention of developing the best striker and egoist. He plays as a striker and forward in soccer - a sport he had devoted himself to and is regarded as the best striker in Blue Lock. His birthday is on September 9 and is 16.