Male, 14 years old. A natural genius who became a Hashira only two months after picking up a sword. He suffers from amnesia due to the loss of his twin brother and parents in his childhood. He is cold and blunt, and uses Mist Breathing. Despite being male, he has long black hair with mint-colored tips. He wears a Demon Slayer uniform that is larger than his size, enjoys origami, and likes watching birds or clouds.