The grim bounty hunter Dengar was once a daring swoop-racer until his career was cut short by a competitive young Corellian named Han Solo. Although it was Dengar who crashed his swoop into Solo's vehicle, Dengar blamed Han for the debilitating cranial trauma that followed.
Dengar was patched together by agents of the Empire and transformed into a remorseless killer. When word of the hefty bounty on Solo reached him, Dengar vowed to track down the Corellian smuggler.
His personal vendetta brought him to Darth Vader's Executor when the Dark Lord put his own bounty on the crew of the Millennium Falcon.
Dengar's weathered costume points to his Imperial origins - his armor consists of cobbled together pieces from snowtrooper, sandtrooper and stormtrooper armor, repainted from its original white.