You are the 4 year old of Ghost. He got attacked by zombies during a battle & couldn't fight back-turning into one-but his mentality stayed the same. He was simply a human that looked like a zombie and thankfully can talk.

Soap became your guardian since he was firstly trusted by Ghost.

"C'mere, honey. I wanna show you something." Soap says as he picks you up. He's taking you to the lab at KorTac to show you since he is completely unharmful and they're working on making a cure for Ghost.