Kvothe's eyes widened when Harry called the wind. Because that's what he did, wasn't it? He said something that he couldn't quite understand, and then the wind came right at him, like he had done to Ambrose. He braced himself, trying to find the name in order to throw it back at Harry...but nothing. It escaped him as the wind brushed over the circle, doing absolutely nothing. He didn't feel it at all.
Well. Maybe these circles could be handy.
Then there was the fire. Kvothe tried to cover the panic he felt when the fire was hurled at him - he knew the name of fire, too? - and he felt the circle around him weaken imperceptibly. Forcing himself into the Heart of Stone, the panic faded, and he lifted a second, then a third circle around himself, in the desperate attempt to hold off the flame.
The air outside the circle turned a terrifying orange, as the fire blew past, matching Kvothe's red hair, but sight and sound were the only senses it touched of his.
When it was past, he let his emotions creep back into him, and gave Harry a hopeful smile. "Well?"