If Percy ever finds out what she is, he will ask her if she requires burnt offerings in her name, he wouldn't want to offend a god that much. As it was, when he saw her, all he could think was 'wow, cool. "Nice horns," and he meant it. His best friend had a set, and they were less impressive.

"Thanks man." Yeah, Percy does come off as part surfer. "So uh, are you related to Apollo?"