Arko backed into the corner, his breath coming in short gasps. "Who are you?"
Here’s a good review you can use or adapt for (as seen on Chorki ), assuming it’s a thriller or crime drama:
On the screen, he saw the doppelgänger sitting comfortably in his chair, looking satisfied. The man on the screen—Arko—watched helplessly as the doppelgänger clicked a new button that had appeared on the interface: