Yeah ^^ 

Well, either or if you want. If they got separated Rain wouldn't stop searching though <.< She's stubborn like that ^^' They could make it back to the ski lodge or a cave or something? 

Depends on how far you want to go with this. I think considering how bad Andro's hypothermia is, if we want to progress anything story wise will need to get her somewhere that she can warm up enough to be able to do more stuff ^^'