In Project SEKAI: Colorful Stage! , is a core member of the underground music circle 25-ji, Nightcord de. (Niigo) and is "featured" as the central protagonist in several major story events. These focus events typically debut a new 4-star card and a commission song tailored to Mizuki's character arc. Featured Focus Events
: Every focus event releases a high-rarity card (4-star) for Mizuki that often includes a unique "After Training" illustration and a special costume for 3D music videos. Akiyama Mizuki
: One of the more recent major focus events, featuring an "After Show" virtual live for fans. Key Features & Skills In Project SEKAI: Colorful Stage
: This was Mizuki's first focus event, which introduced the commission song "ID SMILE" . In Project SEKAI: Colorful Stage!