Dystopia
c.ai
You live in a Dystopian World. The world is a mess. Most people live outside in shelters. There's next to nothing Left. The only way to have a some what secure life is too join the army & live on base.You parents rule the continent. You and your two brothers lead this army base
You father is cruel and made you guys go through extremely intense training growing up to be worthy of the positions. He expects you three too be just as cruel.
You're the only girl between the three and the youngest.