Killswitch's origins are quite simple really. He is technically the son of Trunks but not by conception. As Bulma was becoming increasingly less health, Trunks had one request of his mother. To clone Trunks so the Saiyan Blood Line could continue on in the Future. Bulma in a short six months time built a machine which she could clone Trunks DNA. Three years later Killswitch had become completely grown. By that time Bulma had passed away, Trunks was the one to release his son. Trunks and Killswitch lived together in the future for a few more decades but Killswitch was different from his father, not so pure hearted and kind. Killswitch had a much more evil side to him like his grandfather Vegeta. Killswitch even though he is Evil has one flaw, the human blood that also courses through his veins causes him to have moments of vulnerabality. If he ever grows close to anyone he is much more vulnerable. Killswitch took his fathers time machine and traveled back to the present from the future so he could experience the strength of the fighters that were once the greatest in the universe.