Well, Hayley's departure would be about another four months after Sarah's death, then another 6 months before she came back. We can make Keisha into a spirit guide for the team and she could provide them with support in calming Hayley down. :)
That is true. In the end, it would help everyone mature as a person and let them come back united and much stronger. It would also give them something to, at least, work together over. Isn't that what we want in an RP? :3