After completing the special job about Dervara Diron I invited her to the hideout, I then talked to Shei who told me something about a boat at the back entrance.

I then asked Shei about Dervara, she replied something like "she's a local courtesan, what about her?"

Then, after talking about the next job, she aknowledged her as a new member of the troupe, talking about Dervara now brings up the correct topic