Stella and Jonas' relationship makes me sad. I'm replaying the game to get some gender locked events and got to the event where Jonas and Stella try to get the player to distrust the other, and it rlly highlights just how messed up it is.
Jonas does not respect Stella (or, for that matter, LeVi). He clearly takes her for granted, dismisses her, and openly dislikes her. He actively warns the player not to trust her. If Stella turns out to be Gnosia, he states that he's happy that she's gone.
Stella does not respect Jonas either. She dismisses him and encourages the player to do so as well, writing him off as insane. She directly states that Jonas being happy is usually a bad thing. If Jonas turns out to be Gnosia, she seems happy he is gone, even if she does not state it.
But both of them also seem so lost once one of them has been put into cold sleep. Before saying he's happy that she's gone, Jonas has a long rambling speech reflecting on Stella that is characteristically difficult to follow, but does express regret at not getting to know her better, musing she may have had a hidden beauty. He flip flops between expressing grief for her and deciding he's happy she's gone. Stella, meanwhile, wonders what she'll do now without Jonas, questioning who her 'master' will be; if the player is male, she immediately latches onto him instead.
Jonas gives Stella a purpose, and Stella keeps Jonas grounded. They are in many ways quite dependent on each other. At the same time, they also openly dislike and disrespect each other.
And it's understandable! Stella is basically Jonas' employee; she has every right to dislike his frequently irresponsible behaviour and clear disrespect of her. On the other hand, Stella/LeVi's purpose is to monitor Jonas for the government — Jonas has every right to resent this, as well. It's a bit hard to appreciate someone's helpfulness when you know they're doing it to manipulate you.
They both have entirely fair reasons to resent each other. And yet, they also have no-one but each other. The epilogue confirms that Jonas will be alone until he dies, and Stella will put herself into cold sleep after.
Stella and Jonas' relationship is marked by resentment as much as it's marked by codependence. It makes me sad.