u-olga marie
MAJOR spoiler character from Fate/Grand Order.
The true identity of Beast VII, the final Evil of Humanity, and that of the Foreign God. She first appears in the climax of Lostbelt 5.2: Olympus, but is halted by Kirschtaria Wodime's final act of defiance.
It is currently unknown whether she is the Foreign God, or whether the Foreign God merely uses U-Olga Marie as a vessel.