Brainiac 5

Brainiac 5 (Querl Dox) is a superhero appearing in comics published by DC Comics. He is from the planet Colu and is a long-standing member of the Legion of Super-Heroes in the 30th and 31st centuries. The first live-action version of the character appeared as a regular character in Smallville, portrayed by James Marsters. Brainiac 5 was introduced in the third season of the Arrowverse series Supergirl, portrayed by Jesse Rath. He became part of the main cast starting in the fourth season. An alternate universe female version of Brainiac 5 appeared in the fifth season of Supergirl, portrayed by Rath's sister Meaghan Rath. Brainiac 5 first appeared in Action Comics #276 (May 1961) and was created by Jerry Siegel and Jim Mooney. He was originally written as a descendant of Superman's enemy Brainiac. Several years later, when Brainiac was revealed to be a living computer, Brainiac 5 was retconned to be a descendant of his adopted son. Legion of Super-Heroes (1958 team) Brainiac 5 is a teenage Coluan of the planet Colu, who claimed to be descended from the original Brainiac, one of Superman's deadliest enemies, and wished to join the Legion as atonement for his misdeeds. When Brainiac 1 was revealed to be an android created by the Computer Tyrants, Brainiac 5 "discovered" he was actually descended from Brainiac 2, the leader of the rebellion against the tyrants, as well as being the clone of the original Brainiac. Brainiac 5's ingenuity led to the invention of, amongst other things, the Legion flight ring (perfecting an invention of the original Invisible Kid based on a metal discovered by Mon-El), the anti-lead serum that allowed Mon-El to leave the Phantom Zone and the force field belt which became the signature device of the character. Another of Brainiac 5's creations had less beneficial effects: the super computer Computo, which attempted to take over the world, killing one of Triplicate Girl's three selves in the process. He successfully destroyed his creation with "an anti-matter force".