The thing is, Illya’s daemon doesn’t behave like a daemon. She behaves like, well, a cat.
Source: The Curious Nature of Felines, by rallamajoop – The Man From U.N.C.L.E. (TV) [Archive of Our Own]
I adore daemon!AUs, and this one has some great world-building as well as a Napoleon who can’t stop himself from wondering – and touching…