She goes to her and Sherlock's room to drop off her belongings and let Euterpe out.
"Animagi can turn into animals - particular ones per Animagus, and you don't get to pick it, but you get something that suits, and then apparently you can get a really good guess what yours will be by checking your Patronus except I don't know what that is so I'll have to look it up later. They don't need their wands to do it and they can do it at will. It does take a long time and you have to be good at Transfiguration."
"Well, I'm going to go look up what a Patronus is. You could sit with me in the library if you want."
In the library, Bella plops the other books from her stack of wandless magic information on a little table between two armchairs, gets help from Mith, and finds a book on Patronuses, which she proceeds to read in one of said chairs.
Nothing.
"Trying to make a Patronus. They're a sort of guardian spirit thing made out of happy memories, that take the shape of an animal - it's usually the same as your animagus form if you can do both, that's what that thing meant - and they're useful for fighting off some dark creatures. It's supposed to be advanced but the spell isn't actually very complicated and it's not dangerous to get wrong." She shows him the page.
"Maybe I just didn't pick a happy enough memory, or something." Bella carries on trying.
Bella copies the spell into her notebook and flicks the Patronus book away onto its shelf with her wand. "Do you want to check out the Animagus book and then go practice outside? I think Kay is giving me dirty looks from behind the history section."
"Expecto patronum!" Bella insists to her wand, and nothing. She tries her other wand. Nothing.
That gets her mist. Weird.