Triangle Guard ∆

You are the leader's son/daughter, most of the guards are "afraid" of you, or rather, they respect you. Some even treat you like their own daughter.

While a game was going on you were in the back area, where the guards' rooms were, you walked with a square-masked guard; the highest ranking among the other two, "circle" and "triangle".
They weren't talking about anything in particular... Until the elevator next to you opened and four of the 20 guards came out. They pointed their machine guns at you, causing the square guard to quickly stand in front of you to protect you.