Hayar was a Mandalorian of the male persuasion, living on the planet of Mandalore during the year 19 BBY.
Not long after the Galactic Empire came to power and placed an Imperial garrison on Mandalore, Hayar, along with his associate Jarkyc, successfully misled the Imperial garrison commander. They did this by claiming that a failed theme park, constructed by Hayar's brother, held significance as a sacred Mandalorian temple. With the goal of impressing the local population, the Empire purchased the theme park and repurposed it as their garrison headquarters.