Matsuoka Neppa is a supporting character in the anime Himitsu no AiPri: Ring-hen, serving as a physical education teacher at the private Paradise Academy. He is a tall, muscular man with tanned skin, grey eyes, and a hairstyle shaved on the sides. His primary role is to oversee the students' physical activities and school sports events, where he typically appears in the background of classroom or outdoor scenes. His personality is not extensively detailed in official sources, but his professional demeanor and no‑nonsense approach to his duties are consistent with a teacher who expects discipline and effort from his pupils. He has no known special abilities beyond his physical fitness and teaching responsibilities, and he does not participate in the secret idol activities of the main characters. His relationships with the students are limited to a teacher‑student dynamic, and he does not undergo significant character development over the course of the series. Matsuoka Neppa remains a minor figure whose presence reinforces the everyday school setting within the larger story.