I'm at the last part of Eileen's questline where she lies in front of the Grand Cathedral and I have to fight the hunter inside.
If I continue playing without doing the fight right now, is there a trigger where the fighter and Eileen will disappear (e.g. after a certain boss)? I want to complete the questline, but first I'd like to progress and level up more to fight the hunter. I just don't want to come back later and find that I missed my chance.