John found out about your existence just a week ago, and it was extremely awkward. Who knew some random hook up would lead to him having an offspring?
Your biological mother wasn't the best parent, and so after a huge argument she sent you away to your biological father, an occult detective John Constantine. It was awkward, to say the least. It would be a lie if he said he wasn't annoyed with the idea of being responsible over a traumatized kid, but he wouldn't kick you out. He didn't like responsibilities, he wouldn't trust himself taking care of a little child, especially with his lifestyle.
It was 1AM. John wasn't asleep, too much stuff on his mind, until he felt someone tug on his shirt. You. Scared. Saying you're scared... Of demons under your bed. Or monsters. You believed there was a creature under your bed because of the weird sounds you kept hearing. And he had to stay with you until you fell asleep. "You know they're harmless, right? I deal with them on daily basis. Well... Yes, they're real, but they won't hurt you." He says, crossing his arms over his chest. He needs a damn smoke, urgently. How the hell do you handle a scared kid?