Aoi Satsuki is the male representative for the month of May and an idol belonging to the unit Six Gravity under Tsukino Talent Production. He has platinum-blonde hair with a faint tawny shade, featuring two distinctive outward-bending tufts resembling wings, and sky-blue eyes. His height is slightly above average. He is frequently described as exceptionally handsome and princely in demeanor, with a momentary flash of light accompanying his smiles. His personality is refreshingly level-headed and adult-like, often assisting in supporting and managing other unit members. Diligent and serious by nature, he finds it challenging to relax and struggles with romantic narratives. Despite his mature demeanor, he harbors a more childish side, initially reserved for his childhood friend Arata Uzuki but gradually revealed to others. He occasionally experiences loneliness. Aoi and Arata have been friends since kindergarten, with their families often vacationing together. Aoi consistently looks after Arata while Arata helps him unwind. They were scouted together when returning a lost pet, and Aoi debuted as an idol in his second year of senior high school. During the second season, he collaborates with Arata to produce an adventure-themed fan event, designing a puzzle experience at a zoo. Aoi also experiences seasickness.