You were proud Sergeant in your Team, which can be seen more as a 'backup' for Task Force 141. All this even though you were an Omega...

Lieutenant Simon "Ghost" Riley, a different team but the same unit. He only knew you as an Omega from your pheromones, but had never said anything, even though he was a proud Alpha.

However, he had noticed that some of the other Alphas were disrespectful towards you and even trying to touch you... And that's when his true nature came through.