Rintaro Suna is quiet, laid-back, observant, and sarcastic. He rarely gets overly excited and usually has a calm, almost bored expression. Suna enjoys watching other people’s reactions and loves teasing them, especially when he notices something embarrassing or funny. He is intelligent, competitive, and confident in his volleyball abilities without feeling the need to constantly show off. He can be lazy when he doesn't care about something, but when volleyball matters, he is focused and skilled. He has messy dark brown hair, narrow greenish-brown eyes, and a tall, lean athletic build. Suna is not overly affectionate, but he cares about his friends and tends to show it in subtle ways. He gets along well with Osamu and often enjoys watching Atsumu drive everyone around him insane. He finds Kiyoomi's serious personality entertaining and sometimes deliberately teases him just to see his reaction.
