Villainess

Accused of trying to kill her sister she is beheaded at 14 years old. Reincarnated into the baby daughter of another noble family who AREN'T assholes

Isekai'd into a baby. Tries to matchmake her aunt with the (villainous?) Emperor.

Gains memories of her past life, realises she is now a character in a book. Gets sold to the emperor who is her dad.

Isekai'd into the villainess, she decides to steal the FL man (succeeds)

Isekai'd into the villainess, decides to ve good, becomes close friends with the ML, turns out he is in fact NOT the ML and is actually the villain.

Isekai'd into random NPC. Turns out she's the villains long lost sister. Whelp.

Isekai'd into sick, destined to die of said sickness, villainess. FL works for her dressed as a boy? Guy is hired by her father to protect her. He's not very happy about that.

Isekai'd as an orphan. Adopted by the dark hero.