Yui is a central figure in the popular anime series Jujutsu Kaisen, distinguishable by her straight black hair and brown eyes. She is often perceived as gentle and kind-hearted, though she possesses a wild and somewhat mad energy that expresses itself through an angelic voice that can charm and soothe spirits. Yui is also recognized for her unique personality traits: she is courageous, slightly eccentric, and deeply devoted to her craft as a sorcerer. She is a close friend and ally to the protagonist, Nobara Itadori, sharing a bond that is rooted in a shared passion for battle and mutual respect. Yui works closely with the prodigal Gojo and the powerful Satoro, complementing their skills with her own, while often challenging the equally mysterious Yuta's abilities. Her journey and actions are crucial to the narrative, and she is a catalyst for many important events within the series.