Isekai'd as a side character

Evelyn reincarnated into her favorite novel. Unfortunately, she is an extra who has enormous divine powers but is only taken advantage of and dies a miserable death.
In order to survive, she must pretend to be Cordelia, the goddess and heroine of the prophecy. All Evelyn wants is freedom, not romance. Everything went smoothly until it was discovered that Evelyn wasn’t the heroine.
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○ : child abuse, animal abuse, kidnapping
○ Pages are missing, according to comments

I possessed of the Empress in the novel of Rofan. The problem is that the Empress is a supporting character who will be pushed off the throne by the cunning Emperor, then eventually dies of illness. I don’t want to die cold and alone, waiting for my love to come true, like the original empress. So I'll be the villain and get a divorce.
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I possessed Raphine, the youngest sister of the second male lead, who had no dreams nor hopes, in an impoverished and obsession filled novel. That was also because he had a crush on the female lead, who married the male lead on a contract, and eventually died. I can't believe it's such a miserable ending for my favorite character and kind eldest brother. No way!
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I reincarnated into my own, incomplete novel before I wrote about the beauty’s appearance. All I know about the “Beauty” is that she has black hair and crimson eyes, but after witnessing Prince Reynsis’ unfortunate childhood firsthand, I resolved to go and find the Beast’s Beauty myself.
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Lilian McEllion, the girl who wanted to avoid a bad end, willingly went to the insomniac emperor in place of her sister, Leilan.
She is tasked to help the sleepless emperor, who was cursed by a witch, by using her ability to induce sleep whenever she touches another person's body with her lips.
Can Lilian survive being with the emperor?
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○ : suicide

Octavia is a fujoshi princess, originally a high school student who was reincarnated into her favorite novel, “The Noble King”. In order to solve the successor problem of this “BL world”, the princess was going to enter a political marriage and offer her own child to the king—but she doesn’t want that at all. For a fujoshi who has yet to know what love is, she’ll find her fated partner in this world she's been reincarnated into.
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In a former life, Cosette was just a normal housewife. Now she's been reborn into the world of an otome game, not as the heroine, or even the villainess but as a chubby, unnamed NPC. Is she destined to be pushed aside as the heroine follows her route, or can Cosette avoid the dark future that awaits her?
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○ goes to present in chapter 4

After dying in an accident, she was reincarnated in an otome game. …As a Crow! I can’t believe that I am a crow! Not an extra character, but a crow! When I was looking for a person around me… The first person who appeared was the Crown Prince.
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Ham Dan, whose hobby was reading “Law of Insomnia” wakes up to a beautiful novel-like heroine. But even in the world of fantasy novels, her role is no different. Stuck as the childhood friend, her normal everyday life comes to an end.
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○ I’m including this despite her not transmigrating into an existing story because it’s in a story-like world

Licca Belmonte has grown up in the lap of luxury in an ambiguously–European, sort of 1800s-ish country, when all of a sudden her family adopt a mysterious young runaway, but when Licca tries to befriend the boy, a mysterious screen appears in front of her, telling her all she needs to know to talk to him.
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○ : pseudo-incest; kidnapping