I Became the Villain’s Lost Daughter

I possessed an extra who didnt even have a name in the novel. Her features are black hair and purple eyes that means that she is cursed. And Im the lost daughter of the villain in the novel?! *** I thought I was a passing by extra, but she was actually the lost daughter of the villainous Grand Duke. Erita, my beloved daughter. My precious little sister. Ill protect you. are these the bloody villains Ive seen? My father and brother, who people said to be cruel, were too sweet to me. But the villain has a death ending! It was the first time I received love and warmth, and I decided to change the cruel ending of my friendly family since I possessed it 10 years earlier than the original. Yeah, I will definitely change my familys future Erita, I love you. Whats wrong with the Male Lead?