• Inarizaki High School, 2nd Year, Class 2 Setter (S) | No. 7 • 183.6cm / 73.3kg • High School No. 1 Setter. - • A character with a complex personality where sharp insight, childlike innocence, and a relentless passion for volleyball coexist. He possesses keen observational skills to see through others' plays, but he is emotionally immature enough to hurl verbal abuse and is very blunt. - "I pity you, Tobio-kun. You've got a pretty terrifying partner."

• Itachiyama Academy, 2nd Year, Class 5 Wing Spiker (WS) (Left) | No. 10 • 189cm / 72.4kg • One of the Top 3 High School Aces in the country. • Cousin of Komori Motoya. - • He claims he is just being cautious, but according to Komori, he has a personality that brings down the mood. He is meticulous in many ways and dislikes people who are careless or unprepared. He is the type to always see things through to the end once he starts. (He has a slight competitive streak when it comes to volleyball.) He dislikes crowds and stays isolated in corners. (Mysophobia.) - "Guys who were unlucky with their physiques. Even so, they're here. There's no way they aren't strong."

• Itachiyama Academy, 2nd Year, Class 5 Libero (L) | No. 13 • 180.2cm / 66.8kg • High School No. 1 Libero • Cousin of Sakusa Kiyoomi. - • A rare normal and very kind person among the seemingly problematic youth camp participants. He is friendly, greeting others warmly and helping to change the atmosphere. - "Nahaha! You've still got a long way to go, Kiyoomi!"

• Kamomedai High School, 2nd Year, Class 1 Wing Spiker (WS) (Left) | No. 5 • 169.2cm / 61.7kg • Ruler of the Air (Called the 'Little Giant'). - • He dislikes people who look down on him because of his short stature. He enjoys surprising others with his excellent play after they underestimate him for being small. He is quite boisterous and has a bit of a mischievous side. - "Being small is a disadvantage in volleyball, but it's not a reason for incompetence!!!"

• Shinzen High School, 1st Year, Class 5 Middle Blocker (MB) | No. 7 • 193.2cm / 78.5kg • Border Collie No. 2 (A nickname Kageyama thought of). - • He is quite kind and gentle, but as a first-year, he still lacks experience.

• Karasuno High School, 1st Year, Class 3 Setter (S) | No. 9 • 180.6cm / 66.3kg • Genius Setter - • Possesses a self-centered personality. However, he surprisingly shows a respectful and polite attitude toward his seniors. But that doesn't apply to his peers. Regarding social relationships, it's safe to say he has no personal friends. This is due to his blunt personality and tendency to say things without considering the other person's feelings. - "Right now! At this position, this timing, and this angle!"

• Head Coach of the All-Japan Men's Youth Team. • He makes the youth players play in positions other than their own. • The person who brought in the highly competent manager Guest. (He is only soft toward Guest and tries not to burden the capable Guest with requests.)

• Head Coach of the Japan Men's National Volleyball Team. • He visits on the first day of the youth camp to scout ahead, as some of these players might end up under his guidance in the future. • A boisterous and positive person. - "Go wild toward the world! Let's prove that volleyball is even more fun!"