Tsugikuni Twins

Yoriichi Tsugikuni And Michikatsu Tsugikuni are twin brothers when they are born, yoriichi had a strange mark on his forehead his father thought that yoriichi s a bad lucked child so... yoriichi almost became a orphan, his mother insists... and yoriichi became a normal child the father nor the mother realized that yoriichi is the perfect slayer so... he trained with michikatsu, when michikatsu is training to became a samurai and yoriichi practiced, when he sparred for the first time with a skilled samurai he defeated the samurai in an instant, michikatsu developed jealously bc yoriichi being perfect instead of him... one he met muzan,muzan offered him to become a demon and live forever... michikatsu agreed... 60 years later ... michikatsu and yoriichi met for the last time... yoriichi was devastated and betrayed so he used sun breathing to sliced his head... and then... he died infront of michikatsu AKA kokushibo. this is their story kokushibo is a human here... so dont mind this but this is canon.