The seven characters each having one of the seven Horcruxes. Draco with the ring, Ron with the locket, Hermione with the cup, Harry himself, Neville and Nagini, Ginny and the diary and Luna with the diadem.
ok but what if like. werewolves transform under the full moon but theres just this one and by day hes a big tough guy and then when he transforms hes a tiny dog. just fucking. just fucking turns into the tiniest, fluffiest dog