These are the Spaniards who dares to rebel against the occupation of Spain by the Napoleonic armies.
The white shirt symbolizes the innocence of this character who did nothing (Napoleon's army will indeed shoot hundreds of innocent people), arms outstretched is a reference to Jesus Christ, the innocent victim of the Romans.
NAPOLEONIC soldiers in rank disciplines symbolize brutality and barbarism they represent obedience "beast" was unjust orders.
The light highlights the victims and perpetrators at the expense of the individual who represents the eye mask of horror