Ai Ninomiya is a supporting character in the anime series Amanchu!. She is a high school student and a member of the diving club. Known for her spirited and energetic personality, Ai is often seen encouraging her friends and diving teammates. Despite her playful demeanor, she is dedicated to improving her diving skills and is always ready to lend a helping hand to those in need. Ai's interactions with her peers add a layer of warmth and camaraderie to the series, making her a beloved character among fans.