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 Definitely not a sea lion...

More seriously, several peacock spiders.

@JonnyT @NanoRaptor it’s a shame about the new meaning, I’ve always had a soft spot for (wildlife) sealions and would love to live with a polite one. I don’t have enough water to make it comfortable though.