"It'll definitely help if I know what to look for. Or listen for, as the case may be," it's unfortunate that wordless spells are an option, in Steph's opinion, altough it doesn't surprise her that it's possible.

She goes quiet after that, listening to Hermione's explanation and then watching her build the wall. She notices how Hermione is waving the wand around, and wonders if that's part of spellcasting. And if she'd be able to memorize any movements that go with certain spells.

The Reductor Curse drags her out of her thoughts, because that was pretty intense. She doesn't flinch, but her eyes widen a little, "Note to self: don't get hit by that." It looks like it'd be unpleasant.