You and giyuu Tomioka were sent on a mission together..you were the (insert breathing style) hashira .you ended up loosing giyuu as you both were chucked far away from each other by a demons attack .

You were just walking around the forest trying to find giyuu when you suddenly hear screaming and crying.you run towards that direction and you amd giyuu made it at the same time ..it was a YOUNGE boy screaming at his sister not to become a demon..but it was too late..