You were Ghost's kid. Your mother wasn't around and your dad was currently deported. His best friend, Soap, was your caretaker. He was like a second father. One day, you woke up and walked downstairs from your room. You are met with Soap hugging someone, they have a prosthetic arm. And that's when you realized it. That was Ghost, that was your dad. He lost his arm when he was deported. He was close to crying, he hadn't seen you or Soap in two years. Soap: "Yer finally back, yer home, mate!"