Shannon.

SPOILER Because
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She is not Shannon, but Violet. Violet soul went into Shannon body. Shannon soul is asleep. And the soul that is into Violet's body is from Korea

the moment she thought about how Shannon is doing things what the usual old Violet would do, i was like "So.... maybe old Violet's soul transferred to Shannon's body? Idk.. maybe I'm wrong..." I FRIGGIN KNEW IT!

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Omg! Wait how did that happen? How does the childhood friend not know the difference in personality? How is the girl from Korea getting Violet's memories then? Does that mean that Shannon's soul will eventually wake up???

Okay so
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Aaron knew from the beginning that Violet is not the real one because he remembers their past life. Even if OG Violet was such a bitch she was still his childhood fried, so when she committed suicide, the trauma was so big that he remembers everything even in his second life. (He is the only one who remembers the past, but all 3 of the ML know that in Violet body there is someone else's soul).
Shannon is a pure soul. She was fed up with everything and she will return into her original body for a bit late in the story because there will be another soul change.
I feel sorry for everyone because the one who cause all of this mess is OG Violet. Even the duke (who seemed trash ) is innocent and a victim of OG Violet schemes

So there would be 2 awaken souls in one body? And they all knew that there was someone else in Violet's body?!?! What would the second soul change be??

Oop forgot to put the spoiler thing

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Inside Shannon's body there are two souls. Shannon one that is asleep and OG Violet one. Shannon soul will not awaken until OG Violet soul will be inside her.
Long story short, MC and Aaron fall in love. Duke and Prince don't stand a chance because MC is not interested in them even a bit. Shannon/OG Violet is jealous because Duke loves MC. She feels also guilty because in her past life she cheated on Duke (who was in love with her) with another man. To get rid of MC she asks someone to rape her.
The second soul change is OG Violet soul returns into her original body, so our MC soul falls asleep. While she is back into her original body she tries to make it seem like MC cheated on Aaron. Because she wants to leave Aaron and marry Duke instead.

The 3 ML knew it all because
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Duke knew because OG Violet stupidly confessed it without even meaning it. But he kind of knew it even before since their behaviour is completely different.
Prince had a hint when Violet said she didn't want to take revenge on Shannon during their walk two chapters ago.
Then they had their suspicions confirmed, but they already suspected it

Wow how surprising. The 3 male leads are all smart.

What happens to the MC's soul....

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As far as I know she awakens again into Violet's body and marries Aaron. And real Shannon ends up with duke who slowly falls in love with het

im. uh. wow. i wasn't expecting much in this story compared to other's that im reading but it turns out to have more plot twist than any other story!!

So then what happen to the OG Violet when shannon awaken? Did she died?

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The most important question is what happens to of Violet's soul? I mean like at the end

Okay, this is weird. No matter the Og violet is bad or good, it's still her body. The korean girl can't take her body even If she is evil. Even if the korean take her body forever, it's still the evil violet face which the childhood friend and others will fall in love with

I'm ages late, but here way happens to OG Violet.
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Her soul goes into MC original body in Korea. And there she meets the author of the novel she was in, who is the carbon copy of the Duke (he even has sis sister disabled and sitting on a wheelchair). At first they kinda quartered but then they fall in love and so OG Violet into MC body has her happy ending with the author in Korea. It was a mess

This is so complicated and confusing

Jesús that was a ride