Ai Nanasaki is a main character in the anime series "Amagami SS." She is a second-year student at Kibitou High School and a member of the school's swimming team. Known for her calm and composed demeanor, Ai exudes a mature and responsible aura. Despite her serious exterior, she has a playful side that she occasionally reveals. Ai's storyline in the series explores her developing relationship with the protagonist, Junichi Tachibana, as they navigate the complexities of high school romance and personal growth.