Originally Posted by
Personamanx
The most simple answer is that they just want to.
It can be argued that most of the Runaways could easily have more fulfilling, and healthy lives if they just chose not to be together in the first original Hostel. Karolina presumably has enough sense to take care of herself, and explicitly has access to her parents' money. Nico was managing in a Hollywood style "Sad" apartment, but one nicer than most people can afford. Molly could go to Krakoa or wherever the mutants happen to be hanging out. Chase has a van and varied skill set, he could make the world his oyster. Gert, and Victor being back from the dead don't have many options but the others are only together by choice.
Klara is the only sensible one of the bunch.