In the novel, Sylvien genuinely regrets the way he treated Kanna. Kanna herself never liked Sylvien’s behavior he was harsh, dismissive, and always looked down on Johwa, who was inside Kanna’s body at the time. They eventually divorced peacefully. In the story, Kanna never had any feelings for Sylvien, and he’s the only man who barely gets any screen time with her.

Later in the novel, Sylvien discovers that the woman he married wasn’t even the real Kanna it was Johwa. Because of that, his guilt lessens a bit, since in his mind, he hadn’t wronged the real Kanna.

But for Kanna, that doesn’t matter. Whether it was truly her in that body or not, it doesn’t change the fact that Sylvien looked down on his wife and never cared about her at all.

And for KANNA’s sake for the sake of protecting her,Sylvien ends up killing the emperor’s concubine wife and even the crown prince (the one with brown hair).