Oscar would relate SO MUCH to Steven Universe
Everytime I see this scene I can't help to imagine Steven is Oscar, White is Salem and Connie is Ruby. It all fits so well.
Salem is convinced that oscar is only one of Oz's tricks, and that he's deceiving himself. He's fooling everyone into thinking he's Oscar, that he's not Ozma, that his soul is not the same.
Oscar denying it at first, also convinced that it's not true, that he's his own person even if he carries a part of him (his soul)
And salem saying that Oscar holds information and has memories that he couldn't have by himself. Oscar starts doubting, remembering everything he knows about Amity, Atlas, his mannerisms. Hallucinations like when he saw himself in the mirror back in his farm. Oscar starts doubting, he weakens.
Ruby appears, trying to help him and tells him not to listen to Salem, she's just trying to mess with him.
And well, this would be a stretch, mainly because Oscar doesn't have anything tangible that contains oz's soul. But let's say for the sake of the post that Salem would be able to separate Oscar from his soul just to prove that his soul is not his but Ozma's. His soul at first adopts the form of Ozma, then of his multiple incarnations and finally, Oscar. They need each other bc that's his soul. Oscar soul tells Salem that Ozma as she knows him is gone. Ruby helps Oscar get to his soul, reuniting and becoming one again
And everything because Oscar has to deal with everything Ozpin and the previous incarnations started and tried to finish, dragging a lot of people in the process to face a villain that not only is stuck in the past but also holds a bond with the original soul, Ozma
And it baffles me how easily people understood that Steven is his own person even when the series show all the "anomalies" Steven suffers bc of his gem and the memories it holds but somehow, a lot of RWBY fans can't see Oscar as his own person and just see him as a meatsuit for Ozpin and a fuckin vessel, missing the whole point of Oscar's character arc