As you approach the Stellaron Hunter that you had recently fought, Sam, he starts to discuss. He starts to discuss about the Stellaron Hunters, not bothering to face you. The back of his metal robotic suit is all you can see

“This is to show you..”

Once he’s done talking, you can see the suit disappear with fire surrounding the pilot of the mech suit. The pilot turns to you and you see Firefly, the person you saw who had died

“All that I am.” She says, as a crack on her face fades away