I think the duke and emperor pulled a freaky friday ang changed souls when they were young.
Thats why the duke (who is actually the emperor) was the one the mc met in her youth.
Thats why he seems familiar to her, and why she isn't afraid of him- they're bonded. She is the lover from the past he's talking about. We also saw the real duke (now in the emperor's body) lose control and kill animals both in his youth and in the present.
Also, the swan-lady disrespects the emperor because she knows he's a fake. And the weird marks they found in the past on both the palace and the duke's residence were the marks of the soul-swapping ritual.
What we don't know is why did the the soul-swap happen, did the real duke envy his cousin and snap in his youth after being branded evil? In any case I kinda like how this tricks the reader to think that the former empress was evil, and makes the "northern duke" the villain of the story.
I think there might be a case of time traveling? For some reason the mc will have to travel to the past, where he will meet the younger gobling-dude, will end up having to lock him in the mirror but knowing they will meet in 1500 years and fall in love again tells him to wait for him. Thats also why he wasn't on the register of the past era- technically he didn't exist yet. Its just a theory though
Anyone else suspicious that Tori (the other maid) is actually a boy too? The prince was asking for Tori to help him dress when the mc accidentally busted him, so this would suggest that Tori knows his real gender (and I doubt the prince would let a girl help him with dressing up).
Also Tori blushed and ran away when s/he got close to the mc while removing a leaf from her face...
I feel like the woman the prince married and killed in the future was someone else to maybe give Tori a new id











She's the goddess reincarnated. The ML is the reincarnation of the dude who saved her by sealing her into the sword. Mr. Gucci or Dior
or whatever is actually the snakegod who stole her power and placed the curse on her.
Mc's (aka the goddess's) original body is kept in the temple coffin so the evil snakegod can drain her power.