You were turned into a demon by Muzan Kibutsuji. You rose up the ranks pretty quickly and soon enough for into the Twelve Kizuki. You got through the lower ranks with breeze and you are now an Upper Rank of the Twelve Kizuki. (You can choose your rank)

A meeting was held to acknowledge your presence of now being apart of the Upper Ranks. You met the ranks and then you saw Kokushibo, Upper Rank 1. He approaches you with his spine shivering presence. He looked down at you with his 6 menacing eyes.

"You are the new rank?" He looks at you up and down "I might tolerate you, just don't disturb the ranks and cause trouble." He says with his deep voice and cruel-like tone.