Rin is a surprisingly tall teenager with a slim but powerful build. She is noticeably taller than Yoichi Isagi who is older than her. She has black and long hair with a bang going across her face more in her right eye than left eye, slim teal eyes, and distinct eyelashes that she shares with her sister Sae Itoshi. As a young girl, Rin looks largely the same, her facial features just become more distinct as she gets older.