Another test with a different actress in the same save file.
(To be clear, my game isn't totally vanilla. I have some mods too. So, the result may be different in your save file.)
Question: Will every actress share the co-stars? (I mean the game using the same co-star)
Answer: No, the game will create a whole new set of co-stars exclusively for you.
For example, if the actress "A" gets the co-star names "A1" and "A2". When I play actress "B", she won't get A1 and A2 as her co-star; the game will make B1 and B2 for her instead.
** You can't keep the co-star role for them when you upload them to the library. I tested with B1 and B2 (upload them to the library, delete current sims, download the same one again), and then the game makes B3 and B4 her co-star.
So, the situation isn't the worst. At least if I'm bored, A1 and A2, I can see the new co-star by playing another actress instead. But A can't escape from A1 and A2 forever... at least in my game with my mods (in case this is a mod-related issue).
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Extra information... I found that although I invited the film director to my home. When I arrived at the studio on the gig day, the game made a new film director, and the existing director became the producer instead. This didn't happen in the lower-ranked director's case.
Now I had 2 film directors in my test save. Fortunately, after I tried another gig, the game won't make the 3rd director. So, having 2 directors would be safe to not have a randomly generated director during the gameplay (I hope so).
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This will conclude my test about "co-star". I just have to accept samey co-stars with love. 😂
