Turning Human

Charlene is a death timekeeper. She basically makes sure that everyone dies at the time that they're suppose to be dead. That's her job of a timekeeper. Since she's a death timekeeper and is already dead, it means that everyone can't see her, hear her or even touch her and can they can walk past her like nothing actually happened. But what happened when a guy walked past her making her turn back to human. What will be her fate? And why is she turning into human when she's already die before?