That was a lot to follow sooo.....technically the first paragraphs before the line cut were about the last king, which isn't ricardo, killing Nina's first life before her reincarnation in order to save other people lives. ORRR.... I am wrong and it was actually what happened in the original novel before the FL got transferred to Nina's body.
If its not any of these than can someone pls explain in a shorter version cause I'm confused ╥﹏╥
Ricardo is the only king. He is the one who killed her in her last timeline. Ricardo = King. And all the stuff that happened in the first timeline happened to the original Nina, before someone else was transmigrated/reincarnated into as her.
The current timeline refers to what is going to happen now. With the current Nina.
Nooo. The girl in Nina’s body was transmigrated into her body... “I became a maid in a TL novel” is the title. But now that she is In Nina’s body things are happening differently in the story. He does not like her because she is a reincarnation of the sacrifice because the sacrifice was the OG Nina. He likes her because she is Nina.
The Nina now is the Nina that was sacrificed in the original story.
The “original timeline” is what happens in the original story.
But now that someone else is in Nina’s body, the original story is not going to happen.

First off this isn’t a spoiler but here is a guide for the mls
the king (possessive black hair) = ricardo milos <-- ML
the doctor (stoic red hair) = dio
the knight (short hair meathead + scar) = leo
the grand duke (blonde brat) = alexion selek iberia, alec for short.
the scholar (brown hair softie) = beato / beat
Read if you want. (Spoilers from novel updates thread)
This is A LOT of spoilers. (Copypastas btw I didn’t write all of this up, just gathered information. It’s kinda jumbled up.)
(Here is the source: https://forum.novelupdates.com/threads/i-became-a-maid-in-a-teens-love-novel.105903/page-4)
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The terms Saint’s sister and pope’s sister are going to be used interchangeably here because some are saying Nina is the saint’s sister and others are saying she is the pope’s sister.
Info on her past timeline, how Nina was killed:
“ The king of Iberia extended a strange letter. As soon as the scholar saw that letter, he could not say anything.
The king's late voice rang in his ear,
"What should I do?"
The contents of the letter were simple.
He meant to kill an 18-year-old maid locked up in a West-like place. In a brief letter, the reason was briefly written, and he thought calmly.
For now, it was important to know who Nina Cage was in the letter.
"If it's Nina Cage, you mean the child trapped in the west tower, escaping with the Holy Saint?"
The king nodded. The scholar thought about Nina Cage.
She was a woman he knew, No... a child he knew.
'If you ask what our relation is, there's nothing between us'
They were in a friendly relationship, renting a waiting room he had found to avoid the disturbance. There were many maids who had learned to go around because they were looking for a good place, but she was especially a pitiful child.
'You seem to be suffering from the blame.'
She was crying in the waiting room, so I comforted her a few times. But other than that, we rarely met. The maids crying in the corner of the castle were surprisingly common.
"After a few years passed, I was going to let her getaway far from the castle." (Ricardo)
"I heard that, too. Your Majesty, I've seen her closely. But I heard that the escape was caused by a cathedral brainwashing."
"Yes, but it was related to the Queen's life."
Beato put his chin in his mouth and fell into agony. The contents of the letter were also serious to the naked eye.
'When it comes to the Queen, His majesty is always picky.'
It was only three years ago that the iron-armed Iberian king fell into love. He kidnapped the saint and made her a queen. Nobody knows, but Beato knows. At first, it was quite rough, but this man really fell in love.
'There's another saint too. so I don't have to go to the rescue...'
Nevertheless, he went to the Holy Land to save the saint. So the king made the saint a queen.
"If this is true, Nina Cage is a substitute for a saint. Plus, because your heart has been healed, there's a risk of the saint's seal getting out."
"Yes, so I'm trying to get rid of Nina Cage trapped in the Western Tower."
Beato frowned. This king, who is trying to kill an innocent child with no guilt was not cruel. Strangely enough, he remembered the Bible in the holy land.
If you sacrifice one person, you can protect the one you love.
Would you be able to kill that person?
I couldn't tell why this phrase came to mind. Maybe that's why the little face of the little child came up in my memory and disappeared.
'Was it platinum blonde?'
A girl with the same hair color and round red eyes as Saint, No, the Queen.
Honestly, the first time I saw her, I thought she was cute.
'That's strange.'
Strangely, it struck me. Beato pressed his chest down because something was strange. Maybe she was the reason. I have to advise him to kill her right away, but the wrong words popped up.
"You have to be careful about killing people."
The king nodded at his words.
"I'll consult with her."
It was a satisfactory answer. Beato, sugeretto, was satisfied enough, but Beato, strangely human, had a strange impulse.
"Your Majesty, I have a request.'"
"What is it?"
"Let me go to the west tower with you."
The king's face was filled with wonder. He'd like to fully explain in words, but Beato couldn't explain them well.
'Why, all of a sudden?'
Me? Do I feel sorry for her?
Beato tilted his head. There were so many poor people in this world. There was no reason to sympathize with Nina Cage. Poor orphans and poor maids were both common.
"I'll take you through the procedure."
"Please."
Nevertheless, Beato tried to beat this urges many times, but he just couldn't. Sadly, however, The king didn't give an answer.”
... (note: I skipped some paragraphs)
“Such a man became Sgerto, who spoke thoroughly and thoroughly for Iberia, and who was to tell the king to sacrifice his servants for the country.
"A person, who is innocent but must die."
Critics say it's cruel, but the king of Iberia was not one who killed innocent people either. The same was true of Dio, a life-saving doctor, and Jean Leo, a leader in battle.
But the conclusion to kill Nina Cage came pretty early.
''We have to kill her" said Dio, the doctor.
When the circuit of the saint crosses to Nina Cage, the queen will be in danger, it was for this reason.
"I'll allow it." Said Ricardo, the king.
He valued his queen, the saint, in the world. The king thought it was worth killing a little girl for her.
"I'll execute her." Said Leo, the first chief engineer of Griffin.
It was a job to have an executioner. But he was a knight responsible for the leadership of Iberia. Killing an innocent child is a very cheesy job, but the knight was willing to take the job.”
TL;DR: Nina was sacrificed as the “kill one person save 99 more” even though she was innocent. They killed her because they thought that she was a threat to the saint.
And there are side stories for ML’s however it is not an open ending.
“Author just wrote the side story for each ml, like any other novels.
Lol but she had a clever way of writing.
After each 2 side story of the other Ml's, there's a extra about The king and Nina.
And it always gives a hint like this...
"Alec can never take my rabbit away, I would find her no matter what." This was said after alec and nina side story, when the king wakes up from dream breathless lol . And he sees his rabbit next to him and hugged her tightly. After each side story, there's always a extra of king and nina. So the Male-lead is just king.”
———
Spoilers on Nina CURRENT timeline. Must I add that even though the Nina on the first timeline had a tragic fate, it would be best you don’t carry over grudges you have from the other characters into the 2nd timeline because it does not apply whatsoever.
Nina’s romance: “After Nina is found out to be the saints sister, her status is upgraded from a maid, however she is not the saint now. Since her sister is still alive, but she will if something happens. So she’s more like help and the King likes that he feels cool when he touches Nina and starts to get attached to her. It is speculated that Nina is the reincarnation of the first kings kill 1 to save 99 people lover. Which is why the King is more attracted to her since she is the reincarnation. Nina also is able to heal others, so she does that too. She gain a relationship with the Grand Duke(King’s younger brother)and the King gets jealous. That’s when she starts to realize her feelings for him.”
The saintess’s ending: In this timeline, Seraphi will stay with pope. Because he says that he will provide her with everything she needs. So they travel together here and there. She also loses her saint power.
Spoilers regarding Ricardo (the king.) and Nina: in ch 155, end chapter, Nina is the queen-to-be
Spoilers regarding latest raws chapter (Blonde haired woman attacking Nina):
“She's the queen, mother of the duke (Ricardo's brother; Ricardo is the king btw). The king comes to the rescue and sets fire to her face to save Nina, takes her to the Saint for healing and blames himself for not protecting her and says HE'LL TAKE HER TO HIS BEDROOM !!!”
Must I add again: RICARDO IS THE CANON ML. The other side stories (if they are adapted into the manwha) are just “what-if” scenarios.