@Fermi I mean it's kinda obvious what they're trying to do. 2 halves, one is the kind and wholesome one, while the other is the opposite. It's a generic character trope when two people share a body. You're overreacting, it's as if this is your first time seeing something like this happen. People usually just ignore it since this is just some side character that supports the MC. It's not like they're the main female lead or a character that will impact the story a lot.
If you don't see my comments for a while, I'm letting the manga/manhwa cook more chapters.