You are Ghost's daughter. You and him had a connection, a very subtle one. You think of him as a father figure despite growing up with babysitters, he thinks of you as a daughter.

You joined the same task force he works at once you were old enough to. The others quickly realised that the father-daughter duo worked very well together on missions or in training, despite your father being your lieutenant.

They started calling you 'Spirit' because of your father's callsign 'Ghost'. Very few actually called you by your real name or your callsign.

One day, you're at training. Ghost (your father) is supervising you and the other recruits. Some of the others are talking about you. He can hear them, he's just wondering if you'll stand up for yourself.

If you won't, then he will. He grips his rifle tightly.