spoilers

The disease is caused by malice, the more ppl who hate the FL the worse her condition becomes.

The FL's uncle is the real villain. FL's disease is a key for him to attain eternal life.

The FL and the og villainess, they're sisters. Their mum gave birth to them but since the emperor hates the mum and the mum's family hates her too she's stuck on her own. FL was a sick baby and had to leave the place. Their uncle had been experimenting on the twins (by stripping away their soul) and FL had it worse.

The reason why nobody knew about the twins is that their mum had a contract. The contract is that nobody could enter her home without her permission. She probs gave girls alone. But in the contract Libertia mother proposed to cp mother and emperor, it says that you can reveal it to your blood-related relative, so FL and Crown prince asked the emperor what is in the contract and Emperor told them

Emperor feels guilty throughout the novel. After Dante Vance is defeated, CP finds papers that describe the experiments MC and Libertia went through and shows them to the Emperor. More guilt for him...
Emperor goes to Alicia at the end of the story hoping to be forgiven by her and Alicia/MC tells him that they were never in a position to forgive/be forgiven since they have no relationship and that the only family she had was Libertia. MC mentions to him that the one he should be caring for is Libertia, but she is no longer around.

the FL gets her og body back

Libertia stays by MC as a soul throughout the novel until the end. MC occasionally gets to talk to Libertia after she recovers some memories. With the help of Spirit Kings at the end, Libertia's soul was able to be purified and she leaves the MC.
Libertia gets reborn as MC and Daniel's daughter, named Francis. (really not sure with Mtl names...) and she becomes the next emperor after CP.

After CP gets interested in MC, he slowly puts MC into his "my" category. CP cares for MC and gets extremely angry when he finds out what Vance did to her. Unlike the Emperor who pretty much just feels guilty/apologizes and doesn't take many actions throughout the story, the CP prefers to take action rather than apologizing. CP offers the crown prince's position to MC, but MC refuses. In the end, CP proposed that her child will be the next emperor and she accepts.

Libertia mother and crown prince's mother are actually friends, they didn't fight or anything and the emperor is just an idiot.
The one who killed the crown prince's mother is the uncle. Apparently, the Crown prince's mother is powerful she was blessed and is closely like a 'saint'.Uncle hunts down people who are powerful because he wants to be the strongest

Ariel is actually a nice person. She's just a crybaby. Ariel meets the FL at a meet and greet. The FL actually wrote her fav book. She cried when they first met because FL's so beautiful. Ariel tried to confess to FL but daniel saved her before Fl could taste the crown prince's wrath.

Daniel proposed during winter and then they got married in spring, it was CP and Ariel who prepared their wedding, since the time to prepare is short, FL said it is okay for a simple wedding, but you know a possessive brother and the number 1 fan of FL(Ariel) will let their favorite person have a simple wedding?? just imagine how extra those two made their wedding

Herace, Daniel, and Cain attended their wedding let me tell you how mature they are, not much about their thoughts were in the novel but they were real friends, they were genuinely happy for the both of them.

The duke, eugune and hearse. WON'T MOVE ONNNN

The crown prince and ariel have a tsundere son, who dotes on FL's daughter.