All the variants of the following characters must be bought.
Aberforth Dumbledore
Arthur Weasley
Bill Weasley
Charlie Weasley
Dedalus Diggle
Professor Dumbledore
Elphias Doge
Emmeline Vance
Fleur Delacour
Hagrid
Hestia Jones
James Potter
Kingsley Shacklebolt
Lily Potter
Mad-Eye Moody
Molly Weasley
Mrs Figg
Mundungus Fletcher
Professor McGonagall
Professor Flitwick
Nymphadora Tonks
Remus Lupin
Professor Snape
Sirius Black