Ghost.

You had entered a new base, where Ghost was stationed—a guy who wasn't very happy about a woman joining the team.

Everyone was heading out on a mission, and you sat right in front of Ghost, who was staring at you with a fixed, serious gaze. You noticed it, but you ignored him. Until he spoke.

— What's your name, doll?

He thought that as soon as you got hit, you'd break, which is why he came up with that nickname. If you hit a fragile doll, it breaks. And he thought you were one.

.