Joseph Wilson was a mutant born to the mercenary Slade Wilson. Known in costume as Deathstroke, Wilson had been genetically altered so as to have increased access to his full mental capacity which granted him tremendous abilities. He passed the adaptive trait to his second son Joseph who, as Jericho, could phase his body into any their person with whom he made eye contact with so as the control them. Joining the New Teen Titans of Earth-One, Jericho was a reliable member and bonded with teammate Raven as well as dating fellow mutant Kole.
Dick Amber was born to a violent heritage line of warriors, and was granted by the Conscience of Man to merge with various ancestors of his. Learning from his experiences alongside the Justice Society of America, Amber made his own decisions later on pursuing a career.