Regis and Cor flew in with Noctis, to meet up with two people for the exploration itself. Regis had his Summoner on, since that was his stronger asterisk and he was still not steady enough, by his own standards, to take up exploration with Stave Master active.

The faces that their meeting was with were, indeed, familiar. He inclined his head, slightly.

"Castor. Your Majesty." Although he was aware that Ashe might not, actually, recognize him back. He glanced at Noctis, then at everyone else in turn. "I am ready for what is to come whenever we all are."