Olga Marie Animusphere is the daughter of Marisbury Animusphere and the second director of Chaldea Security Organization in Fate/Grand Order. A mage from the Animusphere family specializing in astromancy, she takes over leadership after her father's death. Despite her efforts, she struggles with lack of recognition from her father, who favored Kirschtaria Wodime as successor. Insecure and prone to outbursts, she dies early in an explosion orchestrated by Lev Lainur, existing as a remnant of thoughts. Her soul manifests later, seeking acknowledgment before annihilation in Chaldeas. She appears in various forms, including U-Olga Marie, a powerful entity with gravitational abilities.