Dirk Dreamer, Izzy Fabulous, Dustin Broke, and Kyla Flemming are currently not in world but I always see them walking around, like Kyla is always at the gym, Dirk randomly appears as a top celeberty although I remember in one playthrough that I had Izzy was placed in a household and so was Dirk at one time at least until I turned off fill empty households. I also remember many other sims since my first time playing since installing the game on my new pc but I don't see them anymore.I think those sims that I mentioned all belong to certain expansion packs so I don't think they will be culled.
@Takata5 Some NPC townies by design are in the game but are not in Manage Households:
I think it might have something to do with their hidden traits.
I will see if I can find Kyla Fleming in Manage Households in my game, I know I see her at the gym all the time too. If I can find her I will try to check her hidden traits to see if there is anything different in there.
Here is a link to a thread for more details on NPC Sims in the game but not in Manage Households:
I'm just a regular Sims player, I do not work for EA, Sony, or Microsoft
EDIT: I checked on a New Save and Kayla Flemming is one of the Sims I do see in Manage Households. She didn't have any hidden traits that looked out of ordinary. Is it possible that she was somehow reassigned to be a service NPC in your game? Her default career appears to be Athletic/Bodybuilder.
