[@Noxxis]
Oh I agree! Its sure as heck not going to be for a common goal. Some I feel like are here for the lolz, others out of a sense of responsibility, and the ones just wanting a reward for surviving all this madness.

I know Zwei's reasons are a bit complex. 

1.) He has no clue where the item he looking for is. So he has just as much following these guys around as he does on his own to find it. 
2.) Being asked by the royal of this realm sounds like it would prove to be VERY interesting. 
3.) He needs to better understand this foreign world so these guys would provide ample study.