A manager at the cable company, he (as Sara) and operator Carlota start a triad relationship with Carlota’s boyfriend, Miguel. It’s implied early on that Sara might be trans and feels like a man trapped in a woman’s body. 1929 isn’t a good time for that. The plan wants to run off to Berlin to live as a man.
Frankly who can blame anyone?
After realizing he’s truly a man, Òscar embraces who he is and lives with Carlota, after Carlota’s father dies.
He and Carlota die together with the other Cable Girls at the end of the series.