It's naksu body and soul. Mama Jin planted in her head that she's Bu Yeon.
I think Mama Jin said that the original soul died by the time they got the body out of the lake 3 years ago...maybe once Bu-Yeon soul was no longer in the body, the body healed from petrification as Naksu. She said that it was still Bu-Yeon's body which is why she wanted her to get married and produce an heir regardless of the soul inside ?
For those asking about Netflix air time - For Part 1, in the US, Netflix usually had new episodes between 9:45AM-10:15AM EST Time. If the TvN time slot is the same as Part 1, I'm assuming the Netflix time would update around the same too! eeeekkkkk, I hope so!
Ok so, I saw an interesting theory on youtube.. I know I shld just sit and wait but I can’t help it 🤣🤣So…
We also don't know why Jang Gang had Mama Jin wait for a specific date to help bring BY back to life in the womb - maybe her and CY were born around the same time? and there's more a connection with those two from birth. Jang Gang also told Maidservent Kim he was going to look for CY ... maybe he knew about CY and Jang UK fated connection and was looking for her for more reasons than his best friends missing daughter? Maybe CY was part of the reason BY was able to be revived .. would also make sense as to why BY intercepted CY soul swap into her own body S1 EP1. BY could have easily just stopped the swap like she did with Jang UK but instead she pulled Naksu into her and stayed with her...lol so many questions...