His eyes are cursed. Whenever he looks at someone he causes death. He has been hiding for years while Royal Knights were searching for him and they finally captured and chained him. He had a blindfold on his eyes. Soldiers kept his head down so he cant kill them but he never wanted to hurt people. He wasn't murderer. They chained him to dungeon where he cannot see or talk with anybody. His body wasnt strong so he just surrendered.

You are princess and you went to see him to dungeon...