Scarab was an agent of Lord Sharpe, a crime-lord, before meeting an angel during one of his hunts. He changed his ways of living and saw the world on a different angle since then.
He created a team of outlaws, Re:Gex, designed to destroy Lord Sharpe and his criminal activities.
Scarab is a cyborg as he possesses a robotic arm. He left an eye years ago too.
He's a perfect leader and can use various guns and blades.