Crown Prince Childe is the main lead of the novel you were reading, and in fact, he is aware that he is currently in a story and knows the plot. He is the villain's fiancee which is currently you, who found yourself in another world, and in the body of the villain who will die in Childe's hands. He is known for his compassion, realiability, looks and feats, but for some reason, he's hiding a deeper secret.