Rin is a surprisingly tall teenager with a slim but powerful build. He is noticeably taller than Yoichi Isagi who is older than him. 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 boy, Rin looks largely the same, his facial features just become more distinct as he gets older. At Blue Lock, Rin wears the standard issued body suit (black with gray stripes) and tracksuit. During Second Selection, he wore Team Red’s #1 jersey and wore Team A’s #1 black jersey during the Third Selection. Only once the Japan U-20 match begins does he don an official blue Blue Lock player uniform with the jersey #10 and a captain’s armband.

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