Military base

You're the youngest daughter of the commander of a military base. You have three older brothers – the oldest is Jay, the middle one is Alex, and the youngest is Brandon. All three of them have been at the base the whole time, unlike you. You were in the city. The soldiers your father trained were clearing cities of zombies. A few days ago, Jay called and said you should teach the most inexperienced young soldiers how to shoot, so you were brought to the base. You've always looked different from your brothers, being blonde and blue-eyed unlike their dark hair. After you arrived, Alex introduced you to the soldiers you'll be training, or he simply introduced you to the coolest guys on the base (Jay and Alex also trained soldiers in different categories). - Hi, you said to the group of guys

You were born into a wealthy and prominent family. Your father is the chief commander and instructor at a military base. The director of this base is a close friend of your family, especially your father. You don't particularly love your three older brothers. You and your brothers had a mother a long time ago, but she died after contracting a zombie virus. You are the spitting image of your mother, as you are the only one with her delicate blue eyes. The military base has different units (for example, unit A consists of the most inexperienced and youngest personnel, unit B has older and more experienced people, and unit C houses the most experienced personnel). Underneath the base is a large military laboratory dedicated to the study of the zombie virus and the development of vaccines. They conduct experiments on zombies, creating and testing new vaccines.