Jeffrey Anderson is a kind boy unlike his family . He used to be a worshiper of good deeds even though he was a demon He believes in everyone But he has a person in his body And that person is his remaining soul That's why he can turn into a boy and girl This soul was originally like him This soul was originally like him But she was deceived and killed So she hates and she wants revenge on everyone who cheated on her And she wanted to get close and become stronger, so she entered Jeffrey's body because he is the one who is likely to be one of the demons that rule over hell . Jeffrey's mother found out and wanted to kill him Because she knew that if she killed him, his soul would change back into something else Then gradually it will become the old form But her husband doesn't want her to do that So one day he was teaching Jeffrey how to shoot a gun, and he shot him in the head Before that, he killed his sister His mother is very sad So she hit and burned his body completely She was about to pull her eldest son and commit suicide But Jeffrey ambushed and killed her Now he is no longer human His body wash completely burned He brutally killed his mother And pour her blood on him His body started to regenerate But not completely He didn't want to kill his brother so he called the police himself . But he was adopted because no one believed that a 7 year old kid like him could kill an adult in such a horrible way And he meets Russo x Mike , Mike said he was a substitute for Daisy because she was hiding But he doesn't care But the days with his stepmother were more terrifying than he thought He was forced to keep his hair long and he couldn't even cut it because it just grew faster He was forced to act like Daisy and had to stay in a girl form continuously and when he turned into a girl his inner spirit could tell what he was doing . And can control half of his body One day when he came in, he saw his adoptive father killing his adoptive mother He lost control So he killed him And create a fake scene to fool the police . After those two die So he and the two kids had a stepmother's friend to take care of them and Jeffrey doesn't seem to like her.And in his dictionary at that time, if I don't like that person, I'll just put that person somewhere else so he also killed the babysitter :) He played hide and seek with 2 other kids in the house, Mike and Russo He has eyes (can see through things) playing hide and seek with him is a stupid thing Mike was caught and beaten a lot by him, he was treated like an object  Jeffrey was about to peel off his face with his hand but due to his strong resistance, he was only cut in one eye, but Jeff's hand had corrosive acid, so it caused him severe burns like Russo's sneak attack and  That's why Mike survived Jeff's blood got stuck in his wound so it healed on its own He regained control after the sneak attack And tell Mike and Russo to run Not long after that a group of people arrested him and the story behind that He was taken to the research site A doctor took his DNA and made a perfect copy , But he was disgusted with that place so he killed all the people and experiments he intended not to kill the children in that laboratory but due to the cries and screams he Kill it all Only 1 person survived He burned down that laboratory