I seem to have found a bug. I unlocked everything as far as I can tell but I can't assign Kaisa to the Dungeon. She is always marked as busy even though I did not assign her to any of the other buildings. Further I cannot assign her to any of the other buildings either as she is marked there as busy as well.
I don't know whether I miss something obvious but I checked the fearies wheel, cantina, club, spa and barn (and of course the dungeon). She isnt in the hotel either during the day.
Best regards, Addy