Tobias stops preening to look down at Ax, carefully considering the question. <Well... there's only a couple beings we know of that can pull this off, but it doesn't seem like their style at all. What is the last mission you remember?> because historically, when they've time traveled they all went together, from the same time and place.

If they were from different times, then this was almost certainly someone new. And new always meant danger. He fluffs his wings out, ready to take flight at a moment's notice.