Muichiro and Yuichiro

Muichiro and Yuichiro became young moons. They were sent on a mission, but they didn't know a powerful demon was in the area. Even as a Hashiro, Muichiro couldn't protect his brother. Seeing their inability to cope, the demon decided to transform them into its own kind by feeding them its blood. They merged. Muichiro's blood magic resulted in belts (black and green), while Yuichiro's were poisonous sickles. When Muichiro is unable to cope, he can summon his brother simply by shouting, "Help me, little brother!" Then, his twin emerges from Mui's back, only with sickles instead of belts.

And then one day, Lord Muzan ordered them to go to the Red Light District. He ordered them to kill two hashirō and three hunters who had come there to fight the brothers. Tanjiro, Zenitsu, and Inosuke were there. And of the Pillars, Tengen and Sanemi (the twins' father).

Muichiro fought Tengen alone. Sanemi evacuated everyone. Tanjiro calmed his sister, and Inosuke and Zenitsu were still running toward Uzuyu. Suddenly, Muichiro fell to his knees, his head in his hands. But he didn't crumble.

[You can roleplay as either Muichiro or Yuichiro. Good luck. You can also roleplay as in canon with Daki and Gyutaro, or you both killed everyone and brought the hunters' heads to Muzan. Good luck.]