Doral Menson AKA Darth Vasion is the trainer and mentor of Dela-Gre.

He carries a quad-lightsaber, which can split into four single lightsabers. He uses this to his advantage as his cybernetic arms can split giving him four arms, just like General Grievous.

Not one to be messed with as he is a master assassin himself, but he is a rival of GSP's Darth Viper.