As I have expected, Elsa is still the otoge heroine. I do not think she enjoys being bullied by Yvonne, as some people above have suggested, it's just that she is confident in her ability to withstand anything Yvonne throws at her. More importantly, putting up with Yvonne's random outbursts of verbal and physical violence appears worth it to her, because at some level, she realizes that Yvonne is a good soul who does her best to hold herself back.
That said, "I will put up with their abuse because I know deep down, they are a good person and they love me" is normally the recipe for toxic and abusive relationships, while the kind of making-up-without-addressing-the-problem we've seen in the last chapter only perpetuates them. If I didn't know about the villainess system, I would really want Elsa to dump Yvonne, and would still understand it if she did, but I am inclined to give this particular toxic relationship a pass because of the otoge context it takes place in. in other words, I do not think we can apply real-world relationship logic (at least not 100%) to a world where something like the villainess system actually exists and has real, tangible effects on the setting and its inhabitants.
From the context of the otoge relationship logic, Elsa is still the heroine, meaning that she is essentially the only individual with real agency in the whole world. As a result of Elsa's agency, Yvonne now pulls a double duty as both a villainess and a love interest, which have conflicting agendas. I'd like to point out that the VS went into full kernel panic mode when Yvonne attempt to reciprocate Elsa's affections, but not when Elsa initiated and carried them out all on her own, therefre the VS apparently cannot interfere with Elsa's agency, only with Yvonne's. Yvonne and a lot of readers seem to view Elsa as a fragile flower who needs to be protected from the evil VS, but from the video game logic perspective, she is still the player character around whom the whole game revolves, and that makes her the dominant factor in everything that happens, and you gotta respect that.