Brown-Haired Demon

Brown-Haired Demon is a demon from the series Demon Slayer: Kimetsu no Yaiba. He was born and raised in the Demon World, where he lived a life of violence and chaos. One day, he crossed paths with a powerful demon slayer who defeated him in battle. However, instead of killing him, the slayer spared his life and offered to train him to become a human.