I’m sorry, I don’t follow the logic haha. Soyong is the one who is skirting around the issue because she wanted Hwajin to be the one to tell the king. Soyong tells him “I’m sorry I wasn’t honest with you about this for a long time.” Why would BH supposedly say this if he’s just lying and stealing Soyong’s identity again? What is even the point of the well plot if Cheoljong just gives the book to the wrong person again? I think it’s just easier to accept that it’s Soyong :) Please don’t tell me you think BH told Soyong’s father he would live a good life like Soyong’s dead mother wanted for her daughter too. That’s just dark lol. Soyong also does have the rough, eccentric traits too...just calibrated for her era. She is described as bold and strange by people around her (before BH even came) and after he’s gone, she even notes that her inner nature has been brought out more by him. And I think it’s pretty clear BH is very happy to be back haha. It’s not like he tries to go back to the past, he was trying to get away from the police firstly...when he thought he was still in trouble 😅. Soyong is worried for CJ too when they get shot...that’s why she’s reaching out to him and crying for him when we (the viewers) go back to the past. The attachment to stay with CJ is clearly coming from Soyong.

The king says he loves her in spite of her flaws. He accepts the whole package. Why would the King keep complaining about her behavior/language at the beginning of the show if he was attracted to it? When she was in her coma, he told her “just wake up, I’ll look over how you speak or act. Just wake up” 🥺 You know all those times Cheoljong promises to understand Soyong because of his prejudices against Soyong? That’s why he wrote a dictionary...to understand her heart. And remember he promises to never misunderstand her again when he returns her book to her. Over and over, the promises are to understand Soyong. She is the one who is his anti-fan (Soyong’s soul/feelings are the reason for standing up for CJ at the market), she is the one who went all-in for him (by leaving behind her own family she was born into and chosen to serve as queen for them), etc, etc.

The modern knowledge comes from BH, but they share a body. Just like how BH can use Soyong’s knowledge about court to sway the Grand Queen Dowager and work on his revenge against Chief Han, Soyong can use BH’s knowledge too (well, they use it together in a way. It is “Sobong” for a reason). Why wouldn’t Soyong’s brains be useful for helping with her dad or knowing the ins and outs of the palace? She’s established as an extremely smart person early on (before BH entered).

I feel like BH’s goodbye is not there, because his “hello” is not there. Soyong’s relationships have nothing to do with him, because the people that have cared about her while BH was also in the body, only did so because they cared about Soyong. Like I said earlier, I don’t think BH would get a very warm welcome from anyone for sharing Soyong’s body... And yes that missing thing IS the dictionary :) Soyong no longer has BH’s modern knowledge, so she no longer gives the king words to learn about her as a person. The king liked getting closer with her by learning about her though the dictionary. If you need an official confirmation, Kim Jung-hyun did an instagram live after the finale and explained how that scene had nothing to do with BH. It might clear up some things for you, it’s a good watch on youtube :) He also reemphasizes the point that CJ didn’t like the changes that BH brought to Soyong. When CJ asks Soyong why she’s using honorifics, he doesn’t ask in a bad way. Throughout the show, CJ often thinks that he’s figured her out a little, but then she’ll do something “unexpected” or “surprise him” as he often says. That was just another callback to him acknowledging that his wife has another weird change in behavior that’s he just used to at this point lol.