[X] Try to talk her down?
-[X] First off ask her if you can move this to another location where you aren't disturbing the dead.
-[X] Explain that she's justified in hating you and for what little it's worth you want to make it up to her. However, she plainly can't kill you permanently, and even if she could, you won't let that happen until you've at least tried to make it up to all those you killed. You won't tolerate her attempting to hurt other people for your actions either.
--[X] If she's willing to talk, explain that you had an epiphany, and you realized what you did wasn't right. But it's too late for the dead, and you have for them is words. But she isn't dead, so what can you do for her? That isn't dying for her or taking over the area or anything. We're trying to be better here. Does she have a place to stay? Someone to help her? Because we know people that will help.
This may be a bit too much talking for her short stem of patience, but it's worth a shot. The last part feels a bit... off, somehow. Don't have a good idea otherwise, though.