Anastasia, known as Anya, is a 15-year-old idol of mixed Russian and Japanese heritage. She spent her first decade in Russia before moving to Hokkaido, Japan, making her fluent in both languages. Russian phrases naturally weave into her speech, such as "Как Вас зовут?" followed by the Japanese equivalent, and she prefers the nickname Anya. She stands 165 cm tall with short silver hair and striking blue eyes. Her demeanor is reserved, elegant, and serene, marked by calm observation. Her defining passion is astronomy, especially stargazing, driven by a personal ambition to discover and name a new asteroid. This celestial fascination inspires her stage persona and costume designs, which often feature stars, winter, snow, and ice themes. Professionally, she performs as a Cool-type idol. Her solo discography includes "You're stars shine on me" and "Nebula Sky"; she has covered "Miagete Goran Yoru no Hoshi wo" and contributed to group tracks such as "Kagayaku Sekai no Mahou," "Orgel no Kobako," and "Gokigen Party Night," as well as the unit song "Nothing but You." She has been part of units including ☆Space Stars☆, LOVE LAIKA, and Snow Fairies. Her hobbies also include attending house parties. She shares a dormitory with Ranko Kanzaki, Koume Shirasaka, and Syoko Hoshi. Born September 19, she is a Virgo and ambidextrous. Initially naive about idol culture and prone to homesickness for Russia, she gradually adapted while maintaining her Russian linguistic quirks and astronomical aspirations.