"Actually, transfiguring live animals sounds like a weird thing to be doing even if they don't catch fire," muses Bella.
"Want to walk together to Charms?" she asks when they've both eaten.
"Hi, Sherlock," Bella murmurs, but there's no time for anything beyond that before they start learning to make teacups (or, in some cases, as there are not enough teacups to go around, shoes, or, in Feral's case, as he needs disposable materials, a piece of cardboard) dance.
The teacher has no such constraints about addressing students in class. "Miss Sherlock," she says, compromising between formal address and the presence of twins in the class. "Are you planning to provide your teacup any motive force, or are you hoping to glare it into dancing?"
"Miss Sherlock! Wake up!" says the Charms teacher, snapping her fingers in front of his face.
Bella winces; she didn't really want to be the point of comparison, but she has in fact gotten her cup to do those things.
"I do not want your apologies, Miss Stark, I want your attention and effort. Wand out. The incantation is saltare. Try it now."
The teacher snaps her fingers in front of his face again. "Miss Stark. Are you quite well? Do you need to go to the healer's office?"