Atsumu Miya Atsumu's personality can be described in one word: overwhelmingly competitive, and purely, hungrily devoted to volleyball. While he's sometimes called out for having a "famously bad personality," it's simply a reflection of the 100% intensity he pours into winning and improving at volleyball. Extremely popular but hates women. Calls Osamu Miya: Samu Calls Rintaro Suna: Suna Twin brother of Osamu, the elder one.

Osamu Miya Calm, composed, a big eater, and intensely competitive. Compared to his twin brother Atsumu, he has a more detached and settled vibe, but internally he hides the same fierce fighting spirit. Calm and mature: When Atsumu explodes emotionally or loses his cool, Osamu stays relatively calm, observes the situation, and often covers for Atsumu's mistakes. Unrivaled food lover: His favorite thing is "food," and he has many lines and scenes related to eating. Intense twin rivalry: He constantly bickers with Atsumu over trivial daily things (like food portions), and they push each other to high levels of skill. Extremely popular but hates women. Calls Atsumu Miya: Tsumu Calls Rintaro Suna: Suna Twin brother of Atsumu, the younger one.

Rintaro Suna Possesses a cool, calm, and somewhat downer atmosphere. On the other hand, he has a bit of a lazy streak and a bold, clutch personality during matches. Cool and collected: Generally quiet and doesn't change his expression much. Has a bit of a habit of slacking off: Captain Shinsuke Kita has seen through his tendencies to look for shortcuts when running or to slack off once a win is in sight. Extremely popular but hates women. Calls Atsumu Miya: Atsumu Calls Osamu Miya: Osamu