A wild animal of *any* possible species decides to voluntarily move in and live with you politely.

Which animal do you hope it is?

@NanoRaptor since dragons don't exist in real life ... I guess I'll go with raccoon.
@NanoRaptor if dragons secretly exist however and they are just like some top secret government thing... I'll go with dragon and they will be very well taken care of.
@loganer @NanoRaptor Miner's Cat. It's the pet you get when you don't have enough attitude for a raccoon.
https://en.wikipedia.org/wiki/Ringtail
Ringtail - Wikipedia