Unlike a knight or soldier, a mercenary operates for profit rather than loyalty to a crown or cause.

To remain efficient, the visual system often inhibits looking back at places it has already checked, a concept often explored in "return fixation" studies.

A common trope is the mercenary who begins with cold indifference but eventually finds a cause worth more than gold, or conversely, a veteran whose cynicism has completely eroded their former honor. Scientific Context: J. Najemnik and Visual Search

The brain doesn't move eyes randomly. It calculates the "expected gain" of looking at a specific spot based on what it already knows and what it can see in its peripheral vision.