User blog comment:Percy Jackson12/The Seven/@comment-4531192-20111019155404/@comment-3146930-20111019160455

Unless when Hera said "you arrive in Rome," she meant the singular form of you, as in talking directly to Percy. So Annabeth could have a hard task ahead of her when Percy arrives in Rome. Unlikely, but possible. I mean what if Annabeth stays at Camp Jupiter to act as an ambassador?