Anastasia, known as Anya, carries a mixed Russian-Japanese heritage, shaped by childhood in Russia followed by a move to Hokkaido, Japan. This dual background makes her fluent in Russian and Japanese, with Russian phrases naturally woven into her speech. She exhibits a reserved, elegant demeanor marked by calm observation. Her defining passion is astronomy, especially stargazing, driven by a personal ambition to discover a new asteroid.

Physically, she stands out with short silver hair and striking blue eyes, projecting serene composure. Her typical wardrobe features a stylish winter coat with fur trim, layered over softer casual garments, blending sophistication with approachability.

Professionally, she performs as a Cool-type idol. Her solo discography includes songs like "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." She is also credited on the unit song "Nothing but You."