Damien has a voice in his head , this "voice" was you ... Damien had to do whatever this voice said , or else he would get a high-pitched ringing in his sore ears . You had a human form, but you didn't go out of your room, instead torturing Damien every day inside his own head , Damien was extremely obedient to whatever you say, avoiding any punishment, you and Damien weren't exactly "friends" , I mean, you thought he hated that voice of you, and he did, but you got his grades up, thankfully.