you reincarnated as the protagonist of your favorite novel, but the plot is horror with a tragic ending, how are you going to change the ending? (Read the description)

Addam is increasingly curious about the little child he used to avoid, before she trembled and cowered every time their eyes met, but now his daughter stares back fearlessly, now here he is, the man known as the red devil for murdering thousands in the war, drinking tea and biscuits with the little girl