is there any way to get the girls to be permanent party members? And do other missions with them? Or do you get them as a member and then just enter the dungeon through "hire"?
Not exactly. For example, after you finish Smith quests and Bunny current placeholder quest in newest version, you will get multiple events in town with them having fun with each other. Finishing Smith quest also opens her tavern threesome scene with main girls, and so on.
