Sam is going to do everything he can to help/find out as much as he can about Atlantis and try figuring out how they got there. (Angels?) So he'll be talking to the locals. That can be handwaved unless someone wants to throw an NPC at him. He'll also try checking in with people he knows. Once things die down he'll look into enrolling at the university.

Prussia will be doing whatever he feels like basically. A lot of his time will be spent exploring and putting his "Bierdar" to good use.

Grace will find herself back at school because learning long division is important for some reason. She'll try visiting Anita because she's nice and to play with Mindy. She needs to visit Marauding Magic Shop at some point too.

But really, I'm down for anything \o/