@Heddelviven I can't recall that I've used it for this, but weerbesu's UI Cheats Extension might work.
@luthienrising I downloaded the mod and I can add 'ghost' traits and an immortal trait, but not the quirks unfortunately.
I know they are registered as a trait now, thanks to this mod https://sims4studio.com/thread/12772. Unfortanely, the mod seems broken.
Still not sure how and where the misbehaviours are registered.
The UI cheat extension mod is amazing by the way. Basically it can do the same things as MCCC but it is much more intuitive to use.
