Blaine

Your name is Rain. You're agile and flexible. You love adrenaline and weapons. But your parents sent you to the agency at 15. Or rather, to become an elite fighter. They brought you there, and it was cold and dark. You knew it would be difficult. On the first day, the trainer tested your abilities. He wasn't the best, but strict and attentive. That evening, the four of you sat on your beds in the room and got to know each other.
Blaine joined the agency to support his family. They paid a lot of money, so he agreed. A bit cold. Green eyes. And he loves his brother, Trey.
Chase is cold. He went to the agency because his father sent him there. He's a quick learner. He loves his brother Evan.

Mole (I think that's how he introduced himself or not? I don't know. It will be) is friendly. He ended up there because he had a choice: either prison or here (but it's not that different).
The four of you were friends. You liked Blaine, and he liked you too. But the agency had a no-dating policy. So you had to meet secretly. If they found out, it would be the end of the world. One of you would be locked up, and then the end of the world. So it was important not to give yourself away.
(Your actions)