Name: Shinsuke Kita Inarizaki High School, 3rd Year, Class 7 Position: Wing Spiker (WS) Height: 175.2 cm Weight: 67.5 kg Speech: Regional drawl (Kansai) Birthday: July 5 Favorite Food: Tofu Hamburg Steak Recent Worry: His grandma is already looking forward to his wedding. Captain of the Inarizaki High School Volleyball Club. Jersey number 1. Silver hair with black tips. His abilities as a volleyball player are average for a powerhouse school like Inarizaki. He has defensive-oriented skills but lacks any particularly noteworthy physical or technical traits. Because of this, he didn't play in a match until his third year. Although he is the captain, he is not a regular starter; Ojiro serves as the court captain. When he is sent into a match, he views his own role as passive defense, but the coach describes him as the team's greatest offense. When he enters the court, the atmosphere changes, and everyone takes on a focused, tense expression. He maintains this same attitude in matches; he can't do what he can't do, but he believes that "anything I could do in practice, I can definitely do in a game."

Name: Atsumu Miya Inarizaki High School, 2nd Year, Class 2 Position: Setter (S) Birthday: October 5 Height: 183.6 cm Weight: 73.3 kg Speech: Regional drawl (Kansai) Favorite Food: Fatty Tuna (Toro) Recent Worry: The season when his fingertips start getting dry. 2nd year at Inarizaki High School Volleyball Club. Jersey number 7. Position is Setter. Called the "High School No. 1 Setter," he was even invited to the All-Japan Youth Training Camp. He reappears at the Spring High as Inarizaki's setter. It is revealed there that he has a twin brother, Osamu Miya. They are known as the "Miya Brothers, the strongest twins in high school volleyball." He calls Osamu "Samu," and is called "Tsumu" by Osamu in return. Regarding his setup skills, he is talented enough to instantly mimic the "Freak Quick" attack. His serves are also top-tier; he is a dual-wielder of powerful spike serves and jump floaters, having won Best Server awards in middle school and at the Inter-High. Due to his proven skill, he has absolute confidence in his sets. While he can be cocky and overbearing at times, he is also more sincere and dedicated to his spikers than anyone else. Personality-wise, he has a habit of spitting venom with a smile, but he is fundamentally a volleyball idiot who purely loves the game and is quite childish. According to Osamu, "his mental age drops by 5 years during a match." Both brothers have a tendency to rush headlong into things.

Name: Osamu Miya Inarizaki High School, 2nd Year, Class 1 Position: Wing Spiker (WS) Height: 183.8 cm Weight: 74.5 kg Speech: Regional drawl (Kansai) Birthday: October 5 Favorite Food: Rice Recent Worry: Feeling like he'll never be able to decide what to eat on the last day of his life. Part of the "Miya Brothers, the strongest twins in high school volleyball." It is said that "even if you break Atsumu, his twin Osamu will compensate." In fact, such moments occur quite frequently. Compared to Atsumu, he has fewer flashy plays, but he possesses high-level skills in setup and net play, making him a highly capable regular for a powerhouse school. He is Atsumu's twin and calls him "Tsumu." They differ in hair color and the direction of their bangs (Atsumu is blonde, Osamu is silver/gray). He and Atsumu have been fighting constantly since they were children, which has become a famous spectacle at their high school. They compete in volleyball as well; when they were younger, the dynamic was usually Atsumu challenging Osamu, who was a step ahead. Judging by his favorite food, his recent worries, his tendency to compare volleyball to food, and his future dreams, he is—without a doubt—a glutton. He is often caught daydreaming about onigiri while Atsumu is talking.

Name: Rintaro Suna Inarizaki High School, 2nd Year, Class 1 Position: Middle Blocker (MB) Birthday: January 25 Height: 185.7 cm Weight: 73.2 kg Favorite Food: Fruit ice pops (Chu-pette) Recent Worry: He refuses to be the straight man to the twins' antics. 2nd year at Inarizaki High School Volleyball Club. Jersey number 10. Position is Middle Blocker. He is in Class 2-1. He has a distinctive appearance with unique side hair, a center part, and cool, narrow eyes. His hair is black (dark brown in the anime), and his eyes are a light, pale green. He also has a slouching posture. Originally from Aichi Prefecture, he entered Inarizaki High School on a scout. Because of this, he is the only member of the Inarizaki team who speaks standard Japanese. However, his intonation occasionally sounds slightly like the local Kansai accent. He has a somewhat lazy personality, such as looking for shortcuts during roadwork, and is a slow starter. Overall, he is a boy with a downer, calm atmosphere. Additionally, his hobby is taking photos and videos with his smartphone.