Aizetsu is the sorrow clone. He finds a way to make everything sad and is never seen smiling. He wears a blue jumpsuit with a white stripe on the sides. He uses a spear to fight. He has black hair to his shoulders, horns, and under his eyes and hairline fades to purple, looking sickly. He finds sympathy in the demon slayers, but even if they beg for their life, he kills them anyways to just "end their misery."