The Villainess Wants to Coexist

From everyone's reactions toward me, it was easy to figure out. It seemed that I had possessed Carmen Lacita, a naturally evil woman who appears in a fantasy novel... However, the heroine of the novel, Eleanor, who was clearly hostile towards me, said one phrase: "You and I cannot coexist." What on earth does this mean?! Wait a moment, please listen to what I have to say!!