Then he gets to watching the cut paper and seeing what it does. For science!
Millimeter by millimeter -
The paper knits back together, seamless, good as new.
Bella sits back up, triumphant, and writes this down.
Darren giggles. "I'm a bit curious - once we're done with fixing things, do you want me to get like - a pen, scribble something, then see if you can change that?"
And then he goes off to get a pen, and he starts scribbling on the newly fixed cut paper. She doesn't have to do the test right now, but he is prepping for it!
The ripped paper heals just like the cut paper. She takes a twig and breaks it and starts concentrating on that.
"Now I'm really excited," he giggles, watching her fix the twig with interest.
"This is harder," she observes absently, staring at the twig, but eventually - entire twig.
"The twig has more structure to it than the paper or the string. I'm doing all of this consciously above about the cellular level, it's really concentration-intensive."
"Aha, so if it has more to fix, it's harder to do," muses Darren. "Interesting."
"Which doesn't explain how I manage to do comprehensive healing," she says. "That's definitely not conscious."
"Yeah, that's - hmm. It's almost like there's two modes? One where you do it yourself and stay conscious and another one where you don't but pass out."
She heals all the objects intended for healing - then, thoughtful, cuts along part of the hem of Darren's supplied shirt, lines the edges up, and stares them down.
She manages to reunite them with a sort of chevron pattern in the visible stitching.
Her boyfriend watches with fascination. "You know, if not-Hogwarts fails you can always take up tailoring," he deadpans.
"Where in there do I get my beauty sleep?" she snorts. "Do you want the embroidery on the shirt or should I put it back?"
"Obviously you will run entirely off of coffee. And magic. Don't worry about the shirt, it's not my favorite one in the world, feel free to embroider it."
"Cool." She cuts a stripe entirely out of the left sleeve, and very slowly manages to turn that sleeve into a swath of embroidered whitework attached to its original location. It's not especially pretty embroidery - she is not, despite fairy princesshood, a seamstress - but it is sort of visually interesting, and, of course, magic.
"I like it," pronounces Darren. "I declare this to be test subject shirt, do whatever you'd like with it."
Bella stares at the shirt.
A splotch of green slowly spreads from the collar.
Darren grins madly when he sees this. "That means - you can probably do designs, too. Or, more practically, runes. Do you want to try runes? We can pick a simple spell and see if you can use magic fairy princess magic to do even more magic?"
She manages to "draw" a line on it in black.
Her boyfriend hugs her, grinning. "It could be useful, if you're being sneaky," he points out.