Nagi is a mysterious girl encountered by Kyoya in Shibuya. She does not speak and rarely displays any emotion, maintaining an expressionless demeanor throughout her appearances. Despite this silent and detached exterior, she becomes deeply interested in Kyoya's singing and dancing, and she becomes his very first fan. Her motivations are not explicitly stated, but her quiet fascination with his performances suggests a personal connection to his art. In the story, Nagi serves as a silent observer and supporter, and her role as Kyoya's first fan may carry significance for his development. Her relationship with Kyoya is central to her presence, though she does not have notable abilities described in available sources. Information about her personal background or character development beyond this is not provided.