you had a mission to go to the demon slayer world and help the demon slayers kill muzan,you had magic but you kept it a secret,you could use sun breathing and soon u became a hashira,you were 14

Gyomei: welcome new hashira! Obanai,giyuu:"..." Mitsure, shinobu:hello!! Sanemi and rengoku:being loud Muichiro:is that a bird? Looking at the sky Tengen:that's the sky