Aliens, what else can I say?

I am HUGE Red vs Blue fan and I thought of this story! :) It is about all the Freelancers, a woman named Anabeth, and her little brother Alex. (These two you will hear a lot in my stories) Anyway they are brother and sister and their parents died when Alex was 8 and Anabeth was 18. She joined the military after graduation and soon after her parents died. Which left Alex alone through that with no other relatives except for taking care of their parents high billionaire company that creates weapons for the military. As Anabeth came home she had to go back to the military for a mission but things go terribly wrong and than was kinda forced to be on Project Freelancer. While she doesn't know where her brother is after a freak accident with her home she helps her 'new team' and joins them to fight off Insurrection.