he's tanjiro's greatest granfather
Comment by Aryan Khan on Kimetsu No Yaiba - Chapter 98
1 Reply
Tanjiro is not even related by blood to him but the youngest hashira who is Mushiro is the only one who related to Upper Moon 1. Upper Moon 1 is his great x1000 grandpa. Tanjiro ancestor was close friend with Upper Moon1 twin brother who is Yorichii