Board Thread:Dark Souls II/@comment-98.185.151.238-20140316172724/@comment-81.106.40.221-20140323224408

As soon as you have killed her, she will be able to respawn, but she will NOT TALK TO YOU, and YOU CAN NOT LEVEL UP FROM HER. I've tried this, Using a scrap character to see if I could. Upon death she drops her feather, and that's pretty much it.

You're screwed from here on out, unless you're doing a no-level-up walkthrough or a speed-run.