Ophelia hears him just fine, even with all the noise. Her audio doesn't function entirely like human ears (though not entirely dislike human ears, of course) and his voice is distinct enough that she can focus on it. She feels him shifting, too, and stays preternaturally still until he instructs her otherwise.

Well, except for her arms, held by the wrists, as he sways in place in front of her. "Rhythm," she repeats, not taking over the movement from him at all but internalizing when and how Gojyo synchronizes. It's...organic. On the beat, yes, but there's a push-pull-not-quiteness that makes the motions slower and faster at different points in between the bass hits. "I feel it."

In a more literal sense: it's hard not to. The thump of the bassline vibrates her metal frame. "It is not mechanical. Nor random." She does not let him bear the weight of her arms, but makes it so they move almost frictionlessly at his direction.