There is no logical reason that these characters should survive their ordeals, but who needs logic when you have The Force?
In every good story, there’s some level of drama that will put characters against insurmountable odds. Star Wars just happens to do that much more frequently – or at least that’s how it seems. Almost every character has had their close calls; whether it be Obi-Wan actually fading away and becoming a ghost, Leia escaping the clutches of the Empire, or Jar Jar Binks actually surviving, there are plenty of instances in which Star Wars characters have been in deep trouble.
There are numerous characters that are in a bit of trouble going into The Last Jedi, including Finn, who might recover from his severe injuries at the end of The Force Awakens. There are two other characters that barely made it out of The Force Awakens alive; mostly because the creators decided to keep them around.
You might remember that Captain Phasma was left in a trash compactor near the end of The Force Awakens. Perhaps you also remember that the Starkiller Base was destroyed. That should’ve been the end of Captain Phasma, except that the writers of Star Wars weren’t done with her yet. The first issue of the Marvel comic book series Captain Phasma goes to great lengths to detail just how she managed to make it off the base before it blew up: in six minutes, Phasma gets out of the trash compactor, disables security codes, and finds a ship featuring BB-9E that will help her escape. There is no way that this character should’ve been able to survive in order to appear in The Last Jedi, but here we are.
There are so many instances in which Luke is in over his head. This could just as easily be the time when he fights Darth Vader, or when he is hanging with one arm in Cloud City. Actually, this is an instance where no one else could’ve possibly saved Luke other than himself. That’s right: this is when he was one-on-one with a Wampa. When One-Arm attacked Luke on his Tauntaun, Luke was in some real trouble.
Despite not having his Jedi training from Yoda at this point, Luke is able to summon his Lightsaber to his hand and defeat One-Arm before becoming lunch. He also had the wherewithal to take his Tauntaun out of the cave, travel with it until it died, and then use its body as protection from the cold; all of a sudden, Luke Skywalker turned into Bear Grylls. Yes, Luke does get discovered by Han Solo in the end, so he doesn’t make it back all by himself, but this is a situation where he didn’t have a prayer, and yet, he survived.
There’s a sub-section of Star Wars fans who love the bromance between Finn and Poe, but Poe wasn’t even supposed to survive after his first scene. Oscar Issac was going to Paris to talk to J.J. Abrams about a big part of The Force Awakens until this exchange sort of soured the mood: