Fan Casting Screw This, I'm Outta Here in Sort by Tropes

Sometimes, a character is pushed just a bit too far. They might be thrown into a dangerous situation, where they'll most likely get slaughtered by their enemy. They might be stuck with people that infuriate or annoy them, and be expected to stay with them for the whole story. The situation they find themselves in might have devolved into something so utterly Sick and Wrong or just downright weird that walking out immediately is the only way they feel they preserve what little remains of their dignity and/or sanity. They might even just be bored out of their skull. So, when the situation just goes beyond what they're willing to put up with, deciding to leave can be a powerful statement.