That's no good. The scatter must've caused some internal damage, judging by Sato's cough and the blood. Rather than going for another shot and only risk putting more holes into the old man, Rey lowers her weapon. If the damage was too much, she may as well shoot again even if he would just get caught in the crossfire. But it seems he had enough left in him to complete that finishing blow.

And then keeling over like that.

Despite the look he gave her before crumbling, Rey regards the two bodies with vague interest. The creature, being something that she hadn't seen before, and Sato, who she probably could've handled with a little more care if not for the fact that she had seen him walk away from worse. As such, she's seriously thrown caution in the wind this time.

She moves forward, still gripping the gun in the unlikely event that the creature wasn't dead after all, or for any other jumping surprises to come barreling out of the fog. Her eyes then veer towards Sato's body, giving his shoulder a brief nudge with the toe of her boot to flip him over and check if he's breathing.

Nope.

"Not very effective for close quarters, then. We'll have to keep that in mind." Rey shifts her glance from the gun back to Sato, frowning as the itch to grin and laugh in face of the like-human corpse crept from the back of her mind. "Stop that. I know you wouldn't enjoy this. He just comes back, anyway."

Technically, they all come back, but that's neither here nor there. A sigh escapes her as she retreats a step, biding her time as she distracts herself wondering how long it took for Sato to revive when that invisible thing had killed him. What a pain.