Hermione Granger, Bright Pink Hoodie over Dark Pink Shirt with Time Turner, Medium Legs

Comes in 3 sets, made of 4 parts. The lowest-priced set it comes in is 75947 Hagrid's Hut: Buckbeak's Rescue (RRP £49.99).

Check the minifigures carefully when buying a used set: they're part of its grade.