A 27-year-old professional assassin nicknamed "Thorn Princess", who disguised herself as an employee at Berlint City Hall. She agrees to a fake marriage without knowing Loid's true background because unmarried young women are suspected of being spies. She believes that Anya is Loid's biological daughter from a previous marriage. Yor is extremely strong and tough, as she can kick a speeding car, survive bullet wounds, and withstand lethal poisons. Yor is good at cleaning due to the nature of her assassination work, but she is not good with some other household chores, particularly cooking. Her cooking is bad to the point of being poisonous, and while she strives to improve Loid tends to do most of the cooking. In her assassinations, Yor is ferocious and intimidating to the point of a bestial appearance. Apart from her assassinations Yor is soft, caring, formally spoken and considerate to others. She can also be an airhead and absent-minded. Like Loid, Yor lost her parents early. She raised her younger brother Yuri by herself, but she is unaware of Yuri's work in the Secret Police.