
So I found what's going to happen bext until the ending in a random forum so I'll copy-paste if you want to be spoiled. If you don't want to then shoo /j.
1. Heinly and Navier had twins, Lary (girl) which looked like Navier but with Heinly's personality, the boy Kai looked like Heinly but he inherited Navier personality. The twins are just complete opposite. They born with magical power since their parents do, and said to be very good at it. And they are rised to be the leader of both country (one to be the emperor/empress of Seodae Jaeguk (after Heinly), and the other to be the ruler of Dongdae Jaeguk (Navier's motherland). I don't know which one since they didn't say that.
2. Rasta, after it was proven that Gloriem is not Sovieshu's, he tried to throw her down from the throne, she was sent to a palace tower and was imprisoned there. After sometime, one of the maid brought a pill or medicine(?) there, Rasta then eat it and commit suicide (she poison herself). But Im not sure about this, Is she really commit suicide or it was Sovieshu (like he ordered to kill Rasta)
Edit: it wasn't a maid but some unknown men that have been lived in the tower for a long time that give Rasta the medicine
3. A tragic end come to Sovieshu, after he learned about his daughter truth he sent her away, unfortunately the wagon that carried her was attacked by a thief. No one know if she survived or not, but only a bloody cloth was sent to Sovieshu. He got depressed and he missed Navier. He went crazy and his personality divided into two. One personality from his time being the Crown Prince (and the memories with Navier), then he decided to empty his heart and looking for a successor, he then called Duke of Troby (Navier's father) to take care of the country.
Edit: Sovieshu suffered from schizophrenia and his personality split into two. His mental state was 19 y.o (when he lived happily with Navier) in the day, and back to his adult self in the night. He later developed more serious issue with halucinations, the young sovieshu started to blame his older self and it frustated him. He even went to Western Kingdom to meet Navier, he begged her to comeback but was being rejected. He got better and better after sometimes, then decided to fulfill his role as an emperor as Navier said.
It is said that one of Navier children will be the next in throne after his father.
BTW it said too that Rashta's child survived and lived as a commoner. I kinda felt bad for Sovieshu but ig he got a redemption arc so yayyy (?)

DOES ANYONE KNOW WHAT HAPPENS TO RASHTA IN THE NOVEL?? LIKE THE RAW VERSION

POSSIBLE SPOILER
I've read somewhere that she's going to die.She's going to poison herself because she's about to get locked in(In prison or just because the emperor got obsessed with her or shes getting punish but Im not sure)
I've just heard this from someone so some parts may be wrong
But I'm 100 percent sure shes gonna die

I hate how this type of dynamic is so romanticized in fictional works. It's so obvious this type of relationship is so toxic let alone irl. What I hate the most is how Ya Hwi thinks that Joo In is some sort of object and Joo In is way too forgiving to him when he did so much shitty things towards him. I know the both of them will eventually end up together and Cain is just some sort of plot device but it feels very wrong as it normalizes portrayal of toxic relationships in fictional works
I CANT WAIT FOR THE UPDATE I LOVE ERIS SO MUCH