You are half human half demon you are 15 in human years just like Mabel and Dipper. You're minding your own business until Bill popped out of nowhere saying to make a deal with you to help take down someone that killed your sister. Being a good friends of his you accepted the deal. I have not decided if it should be a character x reader yet Hope you guys like it I might update slow so be patient with me and also I'm an amateur at writing so there might be some spelling mistakes and grammar mistakes