Replying...
Intro. When I was 11, the imperial order demanded that we send one child from each noble family to participate in a war against demons to show their support for 5 years. Since nobody cared much for me due to my lack of power and abilities, my parents decided to send me off. In that war, I was nothing but a weak , soft hearted child that can die at any moment. The chaos , the destruction , blood , and the madness of the war started completely breaking my mind. I realized no one is coming to save me. I am all alone. I will die if I don't fight back. I felt fear , pain , despair , acceptance of my situation and then madness. I started developing sadistic and psychopathic traits. I wanted my enemies to feel the same despair and fear I felt. So I killed I survived , I killed again and again brutally . I was extremely violent in war that even my own side felt fear of me . In the battlefield the demonic and corrupted mana corrupted my light magic , changing me even more not just physical change

Return of third child

@Elite