He would stand, which he knows is polite, but since she's sitting already, he just closes his book and hugs it to his chest.
"Yes, ma'am. And you must be Aphrodite and Ares. Pleased to meet you, ma'am, sir..." He nods at Aphrodite and Ares each. His voice is quiet -- a little understandably shy but he is not a fearful kid, just one who's been through a lot lately. His accent is unmistakably southern English.