Yuu Haibara is a supporting character in the anime and manga series Jujutsu Kaisen. He was a student at Tokyo Jujutsu High and a close friend of Kento Nanami and Yu Haibara’s cheerful personality and optimism made him well-liked among his peers. Despite his talent and potential as a jujutsu sorcerer, Haibara tragically died during a mission. His loss deeply affected his friends, especially Nanami, and serves as a pivotal moment in the story, highlighting the dangers faced by sorcerers.