On 31 October, 1991, Harry Potter and Ronald Weasley passed the First Floor Girls' Toilets when looking for Hermione Granger, so they could warn her about a troll that had been unleashed in the castle. Witnessing the troll entering the toilets, and seeing that the key was in the lock, the pair locked the room. When they heard Hermione scream from inside moments later, however, they fumbled with the key in the lock, struggling to get it open and save her.
Behind the scenes
- In the Nintendo DS and PlayStation Portable versions of LEGO Harry Potter: Years 1-4, Peeves steals this key, placing it on a high pillar. Harry and Ron are required to use the Transfiguration Spell to turn a nearby statue into a ladder to retrieve it.
- Harry Potter and the Philosopher's Stone (First appearance)
- LEGO Harry Potter: Years 1-4 (Handheld versions only)