Emperor genuinely falls in love with his "destined one" even though Reika didn't bully her (well, other girls did, but their relationship was the cause, not the result) - which I think is very sweet, because they weren't pushed together by circumstances and simply liked each other who they are.
the fact that the fight over dormitory's "masculinity ranking" got more chapters (and more drama) than the swordsmanship tournament between 2 dormitories says A LOT.
Yes, he did almost choke her to death, but the circumstances were completely different. In fact, the "no one was allowed to enter" part was absolutely unrelated to it. The reason he lashed out was because she accidentally stepped on the picture of his deceased lover. And judging from what happened before that, it was the only picture in his possession. But even then, he probably wouldn't have done it if he was not already furious enough to hit his good/best friend before she walked in. He was already emotionally unstable, and then he saw someone step on the thing he "cherished the most". Obviously, he lost his mind. I am not trying to justify his actions, but compare that to "almost killed her when she mistakenly entered a room" and you might see my need to add the clarification.
And no, she is not "weak to him and has no power" just because he had the advantage for 17-18 chapters of a 283-chapter-long novel. Just look at how she toys with him in the chapter 21.
Even 24 chapters in, he is not in love with Yan Hui. He uses her, he needs her, he sticks to her. But he still isn't in love. He will obviously fall for her, but only when it will make sense, and thet's what makes me love him.
she might be OP when she grows up (spirit, daughter of the OP spirit)
Even in the last chapters she is scared to the point of kneeling and breaking down in panic because she does not believe that he isn't using her
And she doesn't even need that to be an outstanding person! She has an amazing ability and amazing magical power. She doesn't need to invent sweets to make them for her son.
In fact, it would be so so so so SO much more interesting to see her work hard to improve her reputation, instead of having everyone fall in love with her instantly because of a cake or two.
Also, I would probably be completely fooled if they were siblings instead. And only one of them being a xxxxx, while the other being who the author wanted us to think they were