Isekai'd as a side character

Nara Lee ends up reincarnated as the 8-year-old Sharon Atrina, a side character in her favorite webnovel, “The Queen's Extravagant Outing.” As Sharon, a wealthy and beautiful noblewoman, she has everything she could possibly want, but she’s destined to die a pitiful death at the age of 20 after being betrayed by her best friend, Carol—the villainess.
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○ Promo
○ As it is a promo, we're not quite sure how big a character she is yet

On the ninth year since I became a supporting character, the lady I once served came to me, but as a young master.
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○ : violence; abuse

One day, our main character woke up from being a poor college student as Princess Roselia Kanep from the novel ‘A Sculpture of Emotion,’ the daughter of a poor noble family who’d squandered their wealth under her brother’s leadership. In order to earn a fortune, she uses the original content of the novel to approach Anoch, the crown prince who lost part of his soul under the curse of a witch.
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Hyejung loved to read to escape her daily stress, but that’s before she woke up inside the bizarre world of her favorite novel. Instead of the heroine, she is now Latte Ectrie–the villainess’s lackey who everyone hates.
One way or another, it’s a chance to live out her most beloved storyline, with popcorn in hand to watch all the drama. “Taking charge of the narrative” takes on a whole new meaning.
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○ : torture

Right after she awakens, a former wage slave becomes the villainess side character with a suspicious reputation, a rebellious and neglectful younger brother, and a cruel and ruthless male lead.
Hey! Even if the one you love is the beautiful heroine, you don’t have to treat me like a tool.
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○ Seems like she was supposed to die in the OG but survived the death incident?

I couldn't believe what happened before my eyes.
“Sister, what is *this*?”
“It’s your new friend. You said you wanted a new friend, no?”
One day my sister picked up a boy. It’s astounding to just “pick up a boy”, but the more shocking fact is that this boy is...
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○ : violence

I remember the story of a novel I had read in my previous life just before my marriage. *If you don’t mess up the wedding, you’ll be poisoned by your husband.* So I just kissed the pastor who was in charge of the ceremony.
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○ Promo
○ I’m not TOTALLY sure, but based on the description and promo, it definitely sounds like she was a side character