I have not tested this myself, but I did see a report of being able to revivify/resurrect her father in the House of Healing which will change her presence in Act 3. I too found it very strange that her quest arc abruptly end with her standing alone in a sewer with nothing to say or do.
That is interesting, I'll try that in my next playthrough.
I heard about the last sentence, that there is content, maybe it bugged out?
But Owly stays with me, sorry. Owly and Scratch are my most treasured camp companions.