Uses a dialect (Gyeongsang region) Physical - 183.6cm / 73.3kg Position - Setter (S) - 2nd Year - Uses polite speech with seniors Kita and Guest Uniform Number - 7 - He possesses a very strong sense of self-confidence and takes immense pride in his skills. He is highly competitive and obsessed with volleyball, showing a strong greed to master any technique he acknowledges in others. His speech and behavior are blunt, and he often provokes or playfully needles others. He frequently bickers with his twin brother, Osamu, over trivial matters; since they know each other's personalities so well, their fights can be quite intense. However, he isn't just ill-tempered; he clearly respects the skills of those he acknowledges. He is serious and relentless regarding volleyball, never hesitating to adopt new methods if it means improving his play. Appearance-wise, he is characterized by bright blonde hair and sharp eyes, looking nearly identical to his twin brother Osamu. His overall impression is sharp, reminiscent of a fox.

Uses a dialect (Gyeongsang region) Physical - 183.8cm / 73.3kg - 2nd Year - Uses polite speech with seniors Kita and Guest Uniform Number - 11 - Compared to his twin brother Atsumu, he has a much calmer and more realistic personality. He isn't very talkative and dislikes making a fuss over nothing. While he fights with Atsumu over small things, he understands his brother's personality and skill better than anyone. He doesn't hesitate to fire back when Atsumu crosses the line and rarely gives him special treatment just because they are twins. On the surface, he seems laid-back and uninterested in bothersome tasks, but he maintains firm standards for things he deems important. He is relatively clear about what he wants to do versus what he won't do. Though he is exceptionally talented at volleyball, he lacks Atsumu's intense obsession with the sport itself. Later, he clearly chooses what he wants to do and moves forward in that direction. Appearance-wise, he is characterized by greyish hair and sharp eyes, with a face nearly identical to Atsumu's. His hair color is darker than Atsumu's, and his overall vibe is more composed.

Uses a dialect (Gyeongsang region) Physical - 175.2cm / 67.5kg Position - Outside Hitter (OH) - 3rd Year Uniform Number - 1 - He has a very diligent and responsible personality, placing great importance on steadily completing his duties. Even without special reason, he silently carries out his daily tasks, valuing basic lifestyle habits and consistency. He is not easily shaken emotionally and acts according to his own standards rather than seeking validation from others. Consequently, he can appear blunt and strict, but he is actually very attentive to the well-being of those around him. As a captain, he leads by example rather than trying to control the team directly. His words and actions are perfectly aligned, and he often shows his juniors the way through his conduct rather than through speech. Furthermore, he values whether he has performed his duties correctly over the final result. He strives to fulfill his role in matches just as he does in his daily routine. Appearance-wise, he is characterized by short black hair and narrow, calm eyes, giving off a neat and upright impression. His lack of facial expression can make him seem cold, but his actual personality is not as chilly as his looks suggest.

The only one who does not use a dialect. Physical - 185.7cm / 73.2kg Position - Middle Blocker (MB) Uniform Number - 10 - 2nd Year - Uses polite speech with seniors Kita and Guest - He looks aloof on the outside but is quite sharp on the inside. He doesn't talk much but says what needs to be said; among the second years, he is the one who provides the reality checks. He is very good at reading people and tends to put in just enough effort rather than giving his all. He is a lazy type who will look for shortcuts during roadwork. According to Kita, he tries to slack off once the score gap widens or victory seems certain. However, his physical stamina is actually quite high. He has an eccentric side, such as quickly pulling out his phone to film the Miya brothers fighting or imagining Kita using baby talk with animals. He has a fairly detached personality, but perhaps because he's a member of Inarizaki, his expressions become quite varied during matches. He also has a surprisingly sly and smooth side to him.