Wu Zetian, also known as Assassin of the Nightless City, is an Assassin-class Servant summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order. Her attitude towards others is haughty and disrespectful, and she acts fundamentally in her own self-interest. "Kufufufu, isn't it only natural that we are more gorgeous and dazzling than anyone else? That aside, do not address us lightly as a young girl. You fool!" Wu Zetian is surprisingly religious. She liked changing era names, titles, and even street names, but this was due to both her preference for new things and superstition. Additionally, her belief in the curse "You'll be reincarnated as a mouse. I will return as a cat to bite you to death!" that came from the executed Consort Xiao just before her death led Wu Zetian to impose a strict ban on keeping cats in the palace. Furthermore, she feared being haunted by their ghosts, and relocated the capital from Chang'an to Luoyang——— "H-Hey! Sneakily recording our weakness like that is cowardly, no, all those are lies and it's not like I'm scared of cats or ghosts but anyways, you will be punished!"