The girl who appeared in the popcorn room is unusual, even by Hogwarts standards. It's hard to describe her, as her appearance shifts and changes - no two people are likely to see her the same way, although they might all agree afterwards on a few things. Her hair might float about her head, many-coloured, or be cropped short. Her clothes are mismatched and strangely fitting (and tend to involve fishnet stockings or gloves, for some reason). The only really consistent thing is her eyes, one green with silver flecks, one blue.
And, of course, right now she was drenched in butter.
Delirium looked about herself, wide eyed. "Ooooh. This is exactly not where I was planning to be. I think. But it's very interesting, don't you think, doggie? "
Nobody answered. She frowned, and looked down, to find herself alone apart from two or three tiny iridescent mice she'd created earlier and forgotten about. They ran up her skirt and disappeared again. "Doggie? Barnabas? "
Still calling, she wandered out into the corridor. "Hello? "
((Permission granted from Death-mun. If your character is or has been insane, on large amounts of drugs, or otherwise, well, delirious, feel free to recognise her ;). And let me know if you'd like her to recognise or know slightly too much about them - she can be very perceptive, but she's also forgetful and easily distracted, as you'd expect, really... ETA: Sandman is one of those 'all myths are true'-type canons, so any gods and goddesses or similar beings are also free to know her or know of her. Or not, if you prefer.
Background info.))