Brainiac 5

On the accepted galactic intelligence scale, the average Earthling is a sixth-level intellect. The average Coluan is a ten, but Brainiac 5 is a twelve. This is something he inherited from the original Brainiac, and his son, Vril Dox II alias Brainiac 2, who freed the people of Colu from slavery to the Computer Tyrants.

After Lyrl Dox, alias Brainiac 3 the "Brainiac" title fell into such notoriety that the family did not use the name for centuries. In the late 30th century, Kajz Dox, Brainiac 5's father picked up the mantle and named himself Brainiac 4. His father died and he was orphaned as a child at age twelve he took the title of Brainiac 5.

While using a Time Viewer to see the dawn of time, the Green Lantern Corps attacked him, but he was saved by the newly formed Legion. Impressed by the team, and using his code name of Brainiac 5, he tried out and joined the Legion alongside Supergirl, who he had a crush on.

He went on to collaborate with the Invisible Kid to invent the Legion Flight Ring using an isotope he discovered with Mon-El. He invented the Time Bubble, which became the primary mode of time travel for the Legion of Super-Heroes. He became close friends with fellow time genius, Rond Vidar.