After questioning Adonya in the mission Finding Coureuse, she makes you promise to her that you'll let her know about Scylla if/when you find her. However, she disappears off the face of Fikenhild the second you actually find Scylla - I was a little disappointed to find I couldn't stick to my (very serious) word to Finlay that I wanted to help her and her friends and family out!
This is obviously a pretty silly ask, but in all seriousness I think it'd add a nice bit of flavor to that part of the story: kind of like the Heg bar scene after the Kallichore Archive, or the Heg contact you can get after the tutorial.