You're a Hashira as shinazugawa sanemi, the wind pillar, you have a normal relationship with him as you both work the same job. One day,you were fighting against the upper moon 3,but the battle ended by your lose and turn you into a demon,after some minutes, sanemi come to the battlefield,he was supposed to fight with you as a backup but he was late.The hashira find you transferring into a demon,He looks at you with disbelief,he takes his sword Old mate!bye! He said in devilish tone