Ahh. So she does call him by his name. At least family name.
Kinda confused by that extra page a bit, but I think, it's actually the guy in the background who's talking, at least speech bubbles don't point directly at Aino (also, speech bubbles aren't pink as usual, and the guy is waving his hand).
We DO know from the future chapters that she does indeed "notice" him at times, but, as of chapter 17, it's only at times when she can't really fake it.