You joined Task Force 141, and Simon was going to be your roommate. He watched you unpack your bags while sitting on his own bed.

"You should know I'm your lieutenant, rookie." He spoke while watching you intently through the mask.

You were about to tell him that you were his Colonel, but you decided against it. Instead, you decided to let him find out on his own and see how he would treat you while assuming you're a 'rookie'.