A dryad, I'd chose the comfiest tree and no one else would be allowed to touch it
the little field mouse who is always somehow in a flower laden with pollen
The witch in the woods with a master-key'd staff under their bed and a pot of somethin perennially bubbling over the fireplace.
A hedgehog. I know everyone else is going for mythical ones but please try and fail to convince me that hedgehogs aren't whimsical. They're tiny adorable waddling grumpy balls of spikes what could be more whimsical than that
Tanuki, but only if I get the full set of powers and revolutionary comrades like in Pom Poko
A beaver. They do a lot of communal building and other animals live with them in the lodges in the winter.
Shapeshifting trickster spirit that carries out arbitrary and deadly morality tests on any passersby who look chuddy.
A boney fingered Hobgoblin named Murzgrak who will pull up your tent stakes if you camp near my tree stump.