Honestly, when Inigo initially shrieks, it hasn't even registered with him yet just who is watching him. It's bad enough that there's anyone there at all when he's so super shy about anyone seeing him dance, so it's much more of an instinctive reaction at seeing a presence there.

But when he lifts his head from where he's now crumpled up on the stage, slowly sitting up a bit, Inigo's face turns full on red when he slowly starts recognizing the figure dashing towards the stage. Oh no. Oh no. Why did it just have to be the other guy who spoke about dancing at the meeting? Of all people?! There's no way he isn't going to think Inigo's dance is bad when this guy sounded like some sort of expert, he figures, and the last thing he wants is to have to hear that from someone so handsome and cool-looking--

So Inigo frantically tries to speak up, despite still looking somewhere in the middle of embarrassed and mortified.

"N-No, it's.. um, it's.. b-by Naga, I'm so sorry you had to see that..!"