[The twirl is easy enough, and she spins into it just fine. Once she can more or less figure out his direction, she's good to follow. Overall, she's a decent dancer. And she got plenty more training from Ruka before she had been allowed to attend her introduction to society.
If anyone can be a scary teacher at times, it's Ruka.
Even as the music picks up, her own feet follow his, matching in time. She smiles a little as they twirl and move, before studying him again briefly.
Finally, after a moment she asks-]
Do you like your costume? I knew you wouldn't dress up otherwise. It's important up for occasions like this, though! Besides, you might get some rehabilitation points. You'll want those for Blood Rose.
[Her eyes widen.] AH-! Unless Yuuri-kun has that, too.