Well, it could lead to a completely different story arc. Maybe she gets a chance to heal and overcome her struggles.
Hannah living could mean she has the opportunity to confront her issues head-on and grow stronger. It could bring about a more hopeful and positive narrative, with her influencing others to seek help and avoid similar situations.
If Hannah lived, it might involve her finding better coping mechanisms, getting more support from friends and family, and ultimately changing the course of events. There could also be new conflicts and resolutions based on this twist.