Worried that "Spoiler" is gonna pack and leave from the Shrine.

Yuria in particular. Yoel is dead as I got the max number of Dark Sigil things as a hollow. Yuria is now here, and I want to complete her story line, but do I need to stay as an ugly prune through the story to complete it, or can I cure myself and still continue on?

Good ol' Dark Souls complexities.