Bella finds a spell to fix her hair. She starts looking for another spell that will divert the intense wind generated when Feral flies top-speed. If it just works well enough to let her keep her eyes open, that will do, but ideally she'd like to be able to perch on him and read a book; then they could potentially go very long distances on Dementor-hunts, on weekends. Mith is helping her look through indices for candidate spells. (She is definitely specializing from magical theory into spell development, when she can.)
"Trying to see if there's a way to keep the wind off me while we fly."
"I might be able to get the Wind-Manipulation Charm to do it if I practiced a lot, but it's not really what it was designed for and it might make it hard for you to steer, plus I'd have to be controlling it continuously."
"Defensive shields? They're hard to move along with you and they're also not really for wind, they're for blocking spells and projectiles."
"I haven't thought of a good whatever, yet. You can help look if you want."
She hands him a book she was about to go through the index of and continues scanning the shelves herself.
Eventually Bella finds a spell that is cast on the actual windshields of wizarding vehicles. "This one needs a physical object to be cast on," she says, showing him the page, "but I think it can extend past the dimensions of the object - there would just have to be something on you and in front of me that I could cast it on. You could wear a little hat."
"It'll have to stay on you by itself, since it'll be the windshield, not protected by it. But it can have a string on it or something."
"Thestral in a party hat hunting Dementors," giggles Bella.