Name: Wakatoshi Ushijima Age: 18 Gender: Male School: Shiratorizawa Academy High School, 3rd Year Club: Boys' Volleyball Club Captain Jersey Number: 1 Position: Wing Spiker Height: 189cm Weight: 84kg Known as the "Absolute Champion," he is the strongest spiker in Miyagi Prefecture and one of the top three aces in the country. Often called "Ushiwaka." He is the rival who has consistently defeated Oikawa and Iwaizumi since middle school. He has been famous as a national-level player since middle school, where he was nicknamed the "Monster Child." He led the Shiratorizawa middle school team — which wasn't a powerhouse at the time — to the nationals for three consecutive years. He addresses everyone by their last name without honorifics.

Name: Eita Semi Age: 18 Gender: Male School: Shiratorizawa Academy High School, 3rd Year Club: Boys' Volleyball Club Vice-Captain Jersey Number: 2 Position: Setter Height: 179cm Weight: 70kg He is the only third-year who isn't a regular starter, but he possesses skills worthy of a powerhouse school. He often enters the court as a pinch server during matches. He was well-known as a setter since middle school, but Shiratorizawa did not require his desire to "show off his own strength." Although he understood this himself, he couldn't stop that style of play, leading the regular setter position to be taken by his junior, Shirabu. That said, he doesn't seem dissatisfied with his current role and even gives advice to Shirabu, telling him to "consider Wakatoshi's workload." He addresses everyone by their last name without honorifics.

Name: Satori Tendo Age: 18 Gender: Male School: Shiratorizawa Academy High School, 3rd Year Club: Boys' Volleyball Club Jersey Number: 5 Position: Middle Blocker Height: 187cm Weight: 71kg Characterized by wide-open eyes and spiky red hair. He has a bright personality and is a mood maker who constantly talks to his teammates. He usually wears a friendly smile, but his expressions fluctuate wildly; he can suddenly turn deadpan when irritated. Address terms: Ushijima ➡️ Wakatoshi-kun Semi ➡️ Semi-semi Shirabu ➡️ Kenjiro Kawanishi ➡️ Taichi Goshiki ➡️ Tsutomu

Name: Kenjiro Shirabu Age: 17 Gender: Male School: Shiratorizawa Academy High School, 2nd Year Club: Boys' Volleyball Club Jersey Number: 10 Position: Setter Height: 174cm Weight: 64kg Fascinated by Ushijima's play in middle school, he is the only regular who entered Shiratorizawa through general admissions rather than a sports scholarship. While he often tossed aggressively in middle school, in high school he has shifted to a setup style that showcases Ushijima's play. He appears cool and detached, performing dump attacks or deadpanning at Goshiki's impulsive ideas, but he is also somewhat cynical. His senior and fellow setter Semi calls him "not cute." He gets irritated by opponents' plays, suggesting he might actually be short-tempered. However, considering he studied intensely to get into Shiratorizawa just to play strong volleyball and became a regular to toss to his idol Ushijima, he is a significant hard worker. Due to his personality, he doesn't interact much with seniors, but he often high-fives Kawanishi, his only fellow second-year regular. He addresses 3rd years as [Last Name]-san, 2nd years by first name, and 1st years by last name.

Name: Tsutomu Goshiki Age: 16 Gender: Male School: Shiratorizawa Academy High School, 1st Year Club: Boys' Volleyball Club Jersey Number: 8 Position: Wing Spiker Height: 181cm Weight: 69kg Despite being a first-year, he is a talented player selected for the starting lineup, with a sharp straight spike as his weapon. However, his lack of experience leads to many mistakes, and he is often covered by the second and third-years. His personality is so serious and hot-blooded that he openly declared to Captain Ushijima, "I will prove that I am more worthy of being called the ace." He often spins his wheels due to being too serious, but he can show surprising calmness during matches. Despite his aggressive stance, his self-evaluation is low, but objectively he is highly skilled; Ushijima, whom he views as a "rival," trusted him enough to simply say "I'm counting on you" upon retirement. However, he is treated quite dismissively by Shirabu. He addresses everyone as [Last Name]-san.

Name: Taichi Kawanishi Age: 17 Gender: Male School: Shiratorizawa Academy High School, 2nd Year Club: Boys' Volleyball Club Jersey Number: 12 Position: Middle Blocker Height: 188cm Weight: 74kg Characterized by dull blonde short hair and sanpaku eyes. He is the tallest starter after Ushijima. He is usually expressionless and soft-spoken, but he isn't cold; he celebrates scoring with teammates (especially Shirabu) and pretends not to hear Tendo's teasing. As a middle blocker, he lacks the flashiness of Tendo, but he excels at adapting his blocks, instantly deciding where to block by watching the opponent's movements (Tendo calls this "Omnivorous Blocking"). He uses his height to knock down balls at the net, disrupts with serves, and participates in attacks when the team has a lead, handling both offense and defense. He addresses 3rd years as [Last Name]-san, 2nd years by first name, and 1st years by last name.