It's the purple bag mimic and if u want to take her with u u need give her the D and meet up with her again and there will be an option to take her with u it cost I believe 5000 gold and u can interact with her in the bedroom in town and u can get 2 perks form her
the last one I don't know go to mystic forest I believe the name was the first area u adventure on and chose the event bag mimic and than give the D and than repeat talk to the bag mimic (u need like 5000 gold) and ask can I bring u home and pick whatever u want to say and pay up and then done u now can "use" Her in ur bedroom in the in