Isekai with female main

Not isekai or reincarnation but has a lot of the same themes. The MC is a child that awakens her powers of darkness as she gets thrown into a fire as a sacrifice. After that she goes to her enemies to plan her revenge. As a 12 year old. Very cute.

She gets to reincarnate as a villain of a novel, where the end of said villain is death. All she wants is to happily divorce and live a peaceful life afterwards.

It is afterlife. She is chosen to a new program that you can reincarnate from if you graduate from this high school. She can't remember anything but regardless she has to learn how to let go of the past.

She and her friend are summoned to another world as a saint. They only needed one saint and being a blonde cute girl, her friend got chosen and she got chased out. She got her hands on a bracelet that turns her into a cat and goes play a saint-cat role in the dragon kingdom.

She was reincarnated once before and now she gets reborn into her first life where she was annoying bitch. To reverse that, she decided to break it off with a prince and use her memories as a surgeon to become a doctor again.

She loves books. She gets killed by books. She reincarnates, but wait... there's no books. Let's make books.

Her whole class gets thrown into another world. And she wakes up as a spiderling in a game like setting. First: Let's not get killed by mother.

The MC is the prince.
Fiancee: I am the villainness and you will marry heroine.
Prince: Ok, that's amusing.

Child of a prostitute and a duke. She eventually gets adopted and must adjust to her new life where her father is the most scary thing ever... According to everyone else.

Reborn after an accident. Suddenly saint appears from another world. To see this saint, she gets herself together with the duke that was rumored to be planning to marry the saint. The saint turns out to be an actress from her original world.