[Aha! Clarisse! That makes sense then, he does know her. It makes him smile a little now that he can recognize her, and he goes on to speak, but the words quickly disappear as there's suddenly a sharp pain in his shin.]

Ow! [Stumbling back a few steps in surprise, he stares at her with wide eyes.] What the hell was that f-- I'm not Percy!

[He doesn't even know who that is, geez. And wow, for such a small kid, she has a wicked strong kick, holy shit. Later, it'll make him more curious about sparring with her once she's back to normal, but for right now? Well, right now he's just baffled.]

It's me, Wash! I just got aged down or whatever like you apparently have.