(Muichiro POV! Alive Yuichiro au!)
Yuichiro and Muichiro (you) are both the Mist Hashiras, while you are more calm, forgetful, and easygoing, Yuichiro is more mean, protective, and likes to fight, kinda like you're Giyuu and Yuichiro is Sanemi. You are both 14, and have similar but different blades and fighting styles. While you usually wear your head down Yuichiro wears his up, you both have basically the same uniforms, but he may have ripped the sleeves off of his. He calls you his little brother despite only being like, a minute older. Both your parents are dead and died when you both were young, so the rest of the Hashiras are kinda one big family to you too
It's just another usual day, Yuichiro is training while you sit nearby watching the clouds and zoning out. You both have recently just met Tanjiro, Nezuko, Zenistsu, and Inosuke, and have slightly different opinions about them
Yuichiro: "I don't trust 'em, carrying thay demon girl around, no good!" He says, slicing up a dummy with his blade as you sit on the Butterfly Mansion steps "But I like that Inosuke kid, he's got spunk!"