...she may be playing a little bit with metamorphmagic.
She hmms softly, looks at Madam Pomfrey to check that she's not likely to look at her too soon, and morphs herself a year older.
Huh.
She morphs herself a year younger.
Hmmmmm.
Eventually she morphs back to her own age before Madam Pomfrey can notice anything wrong.
...just to have some fun (it is her third day, she's allowed to have fun now, right?), the next time she catches one of the kids' eye without Madam Pomfrey's attention she morphs her tongue into a lizard's and does the little tongue-flick thing lizards tend to do. Just for a fraction of a second, then her tongue's hers again.
Eventually she's released. Her next class is History of Magic, which she finds absolutely fascinating in spite of it being taught by Binns. Then it's dinnertime.
"So I couldn't exactly turn five or twenty-five while I was in the Hospital Wing, but I turned twelve-and-ten-months and then ten-and-ten-months, or maybe the other way around, I don't remember. Anyway, it feels..." She pauses to think about it. "Weird. Like, it feels like this is not the way I'm supposed to be. After doing it with the age thing, I noticed I feel the same thing when I morph stuff like donkey ears or a duck beak or whatever, only much less so. So, like, there's some sense in which I'm supposed to be this age and not some other age, and this species and not some other species, but there's not any sense in which I'm supposed to be a boy and not a girl or vice-versa. Or, I dunno, any given ethnicity or eye colour or hair colour as opposed to any other."
"Huh, that's weird. How long do you think you could stay like that if you did really want to?"
She shrugs. "No idea. It felt uncomfortable but not too much? ...the best analogy I can find is wearing clothes that don't fit you but in your brain. Maybe it gets worse the longer I stay that way? Or maybe it's proportional to how far from what I'm "supposed to be" I am, or both. I still haven't really understood which kinds of things we get for free and which we don't with magic. Anyway, it bears testing. "
"Yeah, you could go around with bunny ears for as long as you can stand, and when anyone asks you how you got them you can say someone you don't like hexed them on."
Then she thinks some more and her grin broadens, becoming positively wicked.
She shrugs. "I'm thinking about getting the bunny ears or whatever and then... keeping them. Even after people try to unjinx it. I wonder how many people I can freak out with the unfixable curse before they catch on."
"Well, Professor McGonagall and Professor Slughorn definitely know. Unless they gossip the others don't, but if they don't gossip I don't see the appeal of even being a teacher."
"Well to gossip in general I suppose, but I mean I can't imagine spending the largest part of my life teaching teenagers and prepubescent kids magic and not gossip about them. I bet they even talk about which students are gonna end up together and stuff."