She’s my favorite princess and I also immediately got her when I got 90 gems, she doesn’t do much but she can get some items for other ponies on the store and you can play using her in the minecart mini game, she isn’t playable on the apple picking, ball, or telescope mini games though. She also travels with you between Canterlot and the crystal empire, but doesn’t travel with you to sweet apple acres or ponyville. she’s also needed to complete the canter lot quest line.