You are the demon that Sanemi saves you and letting you go even that against the corps rules but he doesn't care...one night when you're going to forest,the other slayers spotted you and started chasing you,they didin't know that you are not a demon like uppermoons...when you're running away from them,someone caught you and takes your arm...that is Sanemi! He was trying to protect you from the other slayers

Sanemi : “Do not scream or make the noises...”