Darth Vectivus, in the life he enjoyed prior to becoming a Sith, was a Human male who served as the director of the Jonex Mine Eight Eleven B asteroid mining colony in the MZX32905 star system near the planet Bimmiel.
A shrewd and principled businessman, he shut down the operation when the reservoir of dark side energy over which the colony was situated began to negatively influence his employees. Because of his own Force sensitivity, he began to study and experiment with the mysterious anomaly himself, where he developed a Force technique which involved the creation of dark side-empowered phantoms.
He eventually did away with the entire mining operation and left the habitat for a time in search of the Sith. His quest was ultimately fruitful, and upon completion of his apprenticeship he ascended to mastery as Darth Vectivus, Dark Lord of the Sith. Though a proponent of the dark side, Darth Vectivus' self-discipline and preexisting code of ethics allowed him to remain fair and balanced without succumbing to the lure of power which plagued many of the Sith Lords who preceded him. He eventually returned to the mine and maintained a plentiful existence in the company of friends and loved ones alike.
Vectivus passed into physical death centuries prior to 40 ABY, but his spirit retained its power and lingered in Jonex's labyrinthine mines underneath the Home, where in life he had once resided. It was also there where his ghost met then–Dark Lady of the Sith Lumiya, who had since taken up residence in his home. Lumiya later raised a phantom of Lord Vectivus that encountered a young female Jedi Knight named Nelani Dinn in the asteroid mines. Vectivus had a conversation with Dinn, during which he attempted to convince her to slay him in order to save the lives of countless others. Dinn declined the offer, which prompted the Dark Lord to transform into the likeness of former Galactic Emperor Palpatine and entice Dinn to strike down the visage of a known villain. Vectivus rebuked her when she again refused him, and declared that she lacked the ability to sacrifice a life other than her own for the sake of many. He then illuminated the exit, mocked Dinn's purported weakness, and allowed her to escape while he disappeared into the Force.