Movie
Description
Morisuke Yaku is a third-year student at Nekoma High School and serves as the team's starting libero. Standing at just over 165 centimeters, he makes up for his lack of height with exceptional defensive instincts and technical skill, earning him recognition as one of the top liberos in the series. His position as number 3 on the court reflects his vital role as the team's defensive anchor.

Yaku has a well-rounded personality that balances toughness with a caring, almost maternal side. He is fiercely dedicated to his team and often takes on a nurturing role, particularly toward younger or more impulsive teammates like Lev Haiba, whom he keeps in check with a mix of stern discipline and genuine concern. This protective attitude mirrors that of Karasuno's Koushi Sugawara, and the two share a mutual respect and friendship. Despite his supportive nature, Yaku has a short temper when provoked, especially regarding his height. Lev's casual comments on the subject are considered taboo among the team after Yaku physically retaliated, and his teammates are careful to avoid bringing it up.

Yaku's relationship with captain Tetsuro Kuroo began with frequent bickering and disagreements, but over time they developed a strong foundation of trust and respect. On the court, Yaku commands the defense with authority, coordinating the back line and making split-second decisions. His ability to read the game and his precise receives make him a formidable opponent, even earning the admiration of Karasuno's libero, Yuu Nishinoya, who has directly acknowledged Yaku's skill after facing him in matches.

In the context of the Dumpster Battle, the long-awaited official match between Nekoma and Karasuno, Yaku is a crucial component of his team's strategy. His experience and calm under pressure help stabilize Nekoma's defense against Karasuno's aggressive offense. He acts as a leader on the floor, guiding younger players and maintaining the team's composure during tense moments.

After graduating from Nekoma, Yaku pursues a professional volleyball career, eventually playing as a libero for Tigr Ekaterinburg in the Russian Volleyball Super League. His growth from a high school libero with a complex about his height to a professional athlete underscores his dedication and the effectiveness of his technical, intelligent approach to the game.