Yuudai Hyakuzawa is a member of the Kakugawa High School Volleyball Club. He is a first year and a wing spiker on the team. Towering over 200 centimeters (6'7"), Hyakuzawa is said to be an extremely imposing figure. He is usually seen wearing a neutral expression until he gets fired up while playing volleyball. Hyakuzawa is relatively new to volleyball. By the time of the Miyagi Prefecture's First Spring High Preliminary, he has only been playing volleyball for a half year.

In contrast to his domineering height, he is very soft-spoken. He also seems to be a serious and subdued person, which can be seen from his respectful demeanor to his seniors. He doesn't react much other than an simple acknowledgement that he's listening even when his seniors openly praise and brag about him being an asset to the team. Before his match with Karasuno, Hyakuzawa mistakenly believed that his natural height and power was enough to beat Karasuno, thinking Volleyball was simple. Later when Hinata proves him wrong, Hyakuzawa takes the initiative to seek out his senior to recant his words after being humbled.

(Source: Haikyuu!! Wikia)