Querl Dox

Querl Dox, also known as Brainiac 5, is a Coluan and a member of The Legion. A 12th-level intellect considered a genius even by the standards of Colu, Brainiac 5 is an incredible scientist, inventor, and combat strategist, affectionately nicknamed "Brainy" by the other legionnaires.

Early life
Querl Dox was born in the 31st century on the planet Colu to the so called "Brainiac clan". A genius with a 12th-level intellect, the highest ever recorded on the planet, at some point in his life, being inspired by the superheroism of the 21st century and Supergirl's ideals, as well as the story and legend about her, he joined The Legion, a group of superheroes founded and led by the time-displaced Daxamite Mon-El,

While on a mission, he, Mon-El, Imra Ardeen and three other unidentified legionnaires hit a wormhole, and were transported 12,000 years into the past. They decided to put themselves into cryo-sleep until the 31st century, but Mon-El and Imra were awakened early when a torpedo hit their ship in 2017 and they later decided to awaken also Brainiac 5 to help Kara after she lost her first fight against Reign.

21st Century
After Mon-El woke Querl to help Supergirl, they placed her in a suspension tank in the Legion's ship while they fitted her with a neural implant that allowed Querl to go into her mind. Once there, he found Kara in a mental simulation of her loft. He was surprised to find that everything seemed to be normal to both her confusion and irritation. He then introduced himself and told her that she was in a coma following her battle with Reign. However, it seemed like she was stuck. Back outside with the others, Querl told them that Kara seemed healthy enough but couldn't seem to wake up.

Powers

 * Cybernetic interface: Querl is a Coluan cybernetic being. He is able to transfer body in the form of digital code and teleport through any technology by flying into it while in digital form. He can use any electronics as a portal to another destination, traveling through electronic and digital signals, while he is unable to travel through older broadcasting signals. He can interface with any machinery and manipulate computer systems, as well as detect digital electronics and signals, while he could not do so with older broadcasting signals and technology. Being incredibly multitasking, he can project his own mind into another via cybernetics devices and maintain enough clarity to speak at the same time with the person to which he is connected and the others in the real world.
 * Super strength: Querl's strength allowed him to fight a Kryptonian on equal grounds.
 * Invulnerability: Querl's body is denser than a human's but not nearly as durable as a Kryptonian's.
 * Self-repair: As a digital being, Querl is able to self-repair, though only if he is conscious, otherwise the Omegahedron can be used to reconstitute him.

Abilities

 * Genius-level intellect: Querl has a "12th-level intellect", which grants him superhuman calculation skills, amazing memory and exceptional technical know-how. This increased intellect gives him superior calculating abilities, an encyclopedic memory and innovating scientific knowledge even by Coluans standards. By concentrating the power and disciplined nature of his mighty mind he safely operated many 31st century devices with ease.
 * Skilled hand-to-hand combatant: As a Legionnaire, Querl has participated in Legion combat training and is an adequate hand-to-hand combatant.
 * Psychotherapy: Querl is trained in psychology and tried to use his skills to enter Kara's mind and help her to wake from her coma.

Weaknesses

 * Viruses: Since Querl is technically a computer, he can be subjected to viruses.

Equipment

 * Legion suit: Querl wears a protective suit during battle.
 * Legion flight ring: Querl's legion ring allows him to fly.

Trivia

 * Indigo is also Coluan, and another descendent from the "Brainiac clan", originally called Brainiac 8. However, as of now, there are no confirmations of a lineage connection between Brainiac 5 and Indigo.
 * In the comics, Brainiac 5 is called the "black sheep of the family" because he stepped away from being a villain to be a hero and joining the Legion of Super-Heroes.

Behind the scenes

 * In the DC comics, Brainiac 5 is a descendant of the well known enemy of Superman, Brainiac, a prominent member of the Legion of Super-Heroes and one of the longest romantic partners of Supergirl.