Ooooh Mr. Fox’s Lady Mary of Beauty would be interesting. If you go with the Bluebeard version of Mr. Fox, you could have Chise either produce keys for any door or just magically unlock them at a touch, plus or minus a drop of her blood as the price.

For some reason I thought of Sleeping Beauty too (admittedly mostly Disney’s version), with the forest cottage protected by fairies (even Elias is associated with briars), her connections with sleep and sleeping magic, and Maleficent turning into a dragon. Either Briar Rose/Aurora or Beauty could have rose powers too. Her Robin nickname also makes me think a lot of Puck too, although other than generic trickster magic not sure what specific powers she’d have with Puck’s essence.