U-Olga Marie

U-Olga is the main antagonist of the lostbelt saga in Fate Grand Order. She is an existence identified as the Alien God. Previously believed to be the mastermind behind the Human Order Revision Incident, she is actually one of the Apostles of the Alien World manifested to serve the Alien World and lead the other six as their overseer. She manifests in the Class of Beast VII, also called "the VII of the End" and "the Beast That Announces the End". However, later events revealed that she was merely a catspaw for the Alien World and had been made unaware of her true role due to its control over her. After the sabotage of the Fantasy Tree it was supposed to take over, for unknown reasons it ends up assuming the appearance of Chaldea's former director, Olga Marie.

She is usually seen wearing a bizarre attire, consisting of a fur-trimmed cloak with a grey hooded cape, a multitude of ribbons and streamers, two cylinder arm bands and a giant crown. She also has a single small golden horn growing out of the right side of her forehead and two silver metal horns floating around her head. Most of her clothes are floating in mid-air, such as the bands around her arms and the two metal "horns".

Despite using the vessel of Chaldea's former director, U-Olga possesses incredible power on a universal scale with the capability of wiping an entire lostbelt, scaling much higher than the individual rulers of the lostbelts themselves even to the point her "Noble Phantasm" itself may be too overpowered that it has yet to be revealed likely hinting it cannot be comprehended by human standards. However some of her own power shows she's capable of things like conjuring literal black holes and other immense forms of energy-based attacks.