Isekai'd as a side character

After a year possessed as an extra, I picked up the dying mastermind. But this man seems to have amnesia.
“What kind of relationship were we?”
And a strange misunderstanding!
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Alexia, struggling to alter the story in order to survive. Tervion, wanting to keep her for himself. Ophelia, the unknown heroine. The original story has begun to flow in a different direction. A romance fantasy which covers Alexia and Tervion's dreams as the only ones in each other’s eyes.
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○ She says she has three to four lines but then says she dies before the novel starts so I’m not sure if she meant lines about her or if she meant before the novel picks up

She became a villainess who died in the hands of her husband. To be precise, a supporting character who dies after being used as a tool for a strategic marriage by her father and brother.
“I’m in love with you!”
So please, save me!
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I possessed a supporting character in a reverse harem novel. As a young concubine who gained the interest of the emperor. The concubines, the male lords, eventually killed her for treason.
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I woke up in the body of Adeleide, the supportive female friend of the Female Lead in a novel my friend wrote. Everyone's personalities seem different, so how is this story going to play out? I just want to live a quiet homebody life.
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○: mentions of suicide; drugging; kidnapping

Following a carriage crash, our heroine recalls being reincarnated as Vivian in a novel called "The Bloody Flower." Poor Vivian now knows she's a side villain who dies after kidnapping the male lead. But if she doesn't kidnap him and guide him to the female lead, the demon will destroy the world anyway! Unfortunately, the male lead was only described as "handsome," and this world is crawling with handsome men.
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Yeseo is transported into a fantasy novel as the second male lead. Determined to avoid a tragic fate, he decides to avoid the main characters and live a peaceful life.
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I have been reincarnated into the body of a supporting character of a rofan novel. Compared to my previous life, this is truly paradise. To be honest, this might be even better than going through all the difficulties the leads have to endure. I just have to wait for the fourth and last break that my character experiences by the male protagonist in the novel, but suddenly…
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A bad fall awakens Selina Elsner to the truth: she has been reborn into a novel. It also gives her the cruel realization that she's a nameless side character with barely any lines. As if that is not bad enough, the evil lord of the magic tower fancies her instead of the female lead.
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Duchess Helena Thordel has many secrets. Her real name is Lila Violet, she’s not actually an aristocrat, and she’s supposed to be in a loveless, contractual marriage with Duke Aslan Thordel, but she’s deeply in love with him. So when Aslan brings another woman into their home, Helena leaves so he can be happy. Or at least, that’s the plan…
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