I've just had a pretty weird thing happen in my game, the Lobos family (minus Marisol who had died) moved out of town but Anita phoned up one of my sims and asked him on a date, out of curiosity I accepted, she showed up on the street outside my house and just stood there for over a day, couldn't interact with her and no name showed up when I moused over her.
When I restarted the game after clearing my caches she was still there but now called Jenelle Lau and I could interact with her, so I had my founder go out say hello then threw a potent friendship at her, but I see she now has a new name but no traits, It's definitely Anita though, she's wearing clothes I dressed her in myself after she aged up with the ITF sticking up hair so I gave her a makeover.
She was on my radar for future spouse before they left town, if I used her now though would she have to stay with no traits?
I have another human I can use instead but it seemed too good a chance to pass up getting to know the new Anita, I guess the game deleted her info but not what she looked like so just gave her a new name. Perhaps it's a sims witness protection program or something