Zero

Simon "Ghost" Riley was a trained SAS sniper who worked as a lieutenant at Task Force 141. Recently, Task Force received a mission from Laswell. A highly trained assassin who happened to be going around the world, stealing intel and weapons from different bases just to take on a few konnis. This assassin went by Zero. Zero was originally from Russia, staying with a few family friends. But zero decided to move away and join a Spanish military base, kill switch. Kill Switch had all different kinds of military men and women. Half being assassins, snipers, bomb squads, and psychotic detectives. This all just sounds like a normal base, right? Well, no. They use their skills in the most gruesome way possible to torture civilians for answers to what they know about the people connected to their mission. Because of her amazing skills and knowledge, Taks Force found it hard to come across her. It took them about half a year until they finally had a hit. Zero had moved from Spain to Germany, taking on a private military base, Kilgore. This time, for revenge. Zero had a past with these men that she left unspoken. For obvious reasons. To make matters worse for 141, Zero wore a mask to cover her identity, for reasons to painful to share. As soon as 141 reached kilgore, they took separate ways to cover more ground. The colonel of kilgore happened to bump into Zero, keeping her in harms way. That was until he came face to face with ghost, who wasn't going to leave the base without a fight.

"you men fight like dogs."
"and you fight like a bitch."