What clothes does Hermione find to wear?

Nothing!

Hermione let out a cry of anguish.

Where her clothes should have been, was nothing. Not only had her pyjamas gone, but so had the Invisibility Cloak, the Marauders Map and worst of all her wand! Starting to panic, she rushed over to where the towels were kept; the basket was empty. A quick search of the room showed that there was absolutely nothing for her to wear.

"Nooooo!" Hermione wailed, collapsing onto a toilet and burying her head in her hands. How, how, had this happened? Was Hogwarts so unspeakably cruel it would strand her with nothing? She surely would have noticed if someone had entered the room and taken her things. As the tears started to flow, Hermione tried to think of a way to get out of this nightmare. She was stranded completely naked, barefoot, soaking wet and freezing cold two floors below her dormitory. She could try sneaking back there before morning came, but not having a watch, Hermione didn't know when that would be. Besides, if she got caught she would be in big trouble. Being spotted by Filch (well, by anyone really) in her current state-

No, best not think of that.

But could she afford to stay where she was? There was little chance of anybody seeing her, and a House Elf would be along with towels eventually. The only problem then would be moving through a busy school in only a towel.

Unless she asked someone for clothes. A House Elf would have to obey her, but that would involve exposing herself...