Island living NPCs vendors in every location?
I think what might have happened for you is that the game just happened to pick those three for the vendors when it needed them since they don't have jobs. I had it happen with Nalani and she was a stall vendor for a long time. I had made her and the other mermaids immortal via MCCC so she would have been one forever as I play a long term save. The problem I found with the mermaids being stall vendors is that I never saw her as a mermaid out of the world anywhere else, only as a stall vendor. I did see the other mermaids. But I was able to change that by moving them into a house and giving her a career then moving them back to Not In World and making them unplayed again. After that, I began seeing her out in the world as both a mermaid and walk by. The game made a new stall vendor NPC to take her place.
Hope this helps.
