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Penelope Eckart reincarnated as the adopted daughter of Duke Eckart and the villainess of a reverse ...
You'll probably see this on like every list there is but it's realllyyyy good I promise! FL is reincarnated as a villainess daughter where it's near impossible to survive, so she does everything she can to prevent her death and uses her knowledge of the game to do just that. Strong FL!! I won't say who is yandere for her but there's definitely a few who come to mind, one more than the rest.
9/10 *