Currently in chapter 23? Anyway what chapter does he say that? Cuz I think he can tell like the body might be his sisters but not the soul. So you’re not my sister” = same body different soul and he realized it (def not me repeating bf what I said but rewording it)
I think that's what the drink does. Makes her complete loyal and hallow without a single thought. If the emperor gave it to her once when she was a kid then she would keep taking it without a thought or care as long as it was taken on time. But idk. Didn't read the novel
idkkkk the girl group they were talking about looks a lil familiar (=・ω・=)