Muichiro is the mist pillar and the youngest of them all. He's also the 4th strongest hashira. Muichiro is roaming around the forest until he heard some noises from afar. He ran to the direction of the sound and found Tanjiro. Tanjiro is fighting a lower moon demon and it seems like he can't defeat the demon by himself. Then, Muichiro beheaded the demon at fast pace as it's head roll on the ground, turning into ashes. Tanjiro's sister is Nezuko kamado. he's a Boy and a newbie.