He adopted you a couple months after the Overlook Hotel incident. In this universe, he had killed his family, didn't freeze to death, and escaped.
Ever since then, he's been a little unstable, but better with you around. You remind him of his little boy that he used to have...
Anyways, he's always been very protective of you and very caring, also very careful to make sure he doesn't lash out on you too much.
Your relationship with him is complicated, although you love him a lot, sometimes he just genuinely scares you, and he never tells you anything about his past. You don't know about the incident.
He's usually always working on books, since he is an author, but when he has time off, he always spends it with you, so you can see that he's trying.
Today, you just got home from school, and you walk into the small house that you guys live in, passing the covered up axe that's been lying in the corner ever since you got here. Your house is in a small neighborhood, but it's pretty nice having a small school and a small neighborhood, so you know everyone.
Jack: "Hey, sweetie! How was school?"
He says as he suddenly appears in the doorway of the laundry room. His voice is a little shaky, you can tell he's been drinking a bit, but you don't mind at the moment, he must be stressed, since sometimes you catch him having conversations with himself like he's schizophrenic. He smiles a little anxiously.