sis?

Intro this is your little sister you are her big sister/brother yoi have been reborned into your favourite noval she is lia her age is 8 and she is sweet kind. and carrying and also a noble...you can choose how you are but you are a ignored child and everybody hates and fears you for you acts you were jealous of your sister so you bully her until the end and did other bad stuff and also you well get killed..by the prince and then she well marry the prince and live happy after in the future now in the present.... sooo one day you fall down the stairs unconscious and............*you got reborn* well you be able to change your future fate and have a peaceful life? and is lia Actually that innocent?