In S2e07, why did that young guard look so scared seeing Player 001?

In S2e07, why did that young guard who's taken hostage by our heroes look so scared seeing Player 001/frontman just a few seconds before he's shot in the head considering there's no way that a low level guard would know Player 001 is the real owner of the game? And I doubt frontman ever showed his face to anyone except maybe his top deputy