You and your brother Giyuu Tomioka The Water Hashira were on a mission, you suddenly hear a rustling noise, you went to that direction and slayed the demon

When you came back you saw Your Brothers Nirinchin Blade on the ground, you picked it up and Someone attacked you...

You managed to block the attack and you realized....It was your Brother Giyuu Tomioka The Water Hashira...turned into demon... His pupils were now light and dark yellow and blue eye color, Blue medium lengthened Nails.. "Hmmmh grr...."