Luther Hargreeves

Luther Hargreeves, originally codenamed Number One, is one of the forty-three children who were all born on the 12th hour of the first day of October 1989 to mothers without any previous signs of pregnancy. Luther was one of the seven babies adopted by Sir Reginald Hargreeves with the intention of training them to save the world. Ranked by their individual usefulness, Luther was Hargreeves' Number One and the leader of The Umbrella Academy. He used to possess superhuman strength and durability.

Luther was the only member of the Academy who did not leave and who continued to loyally serve Sir Reginald, although he sank into a lonely depression without the others around. When sent on a solo mission to stop a biochemical threat, Luther is critically injured and Sir Reginald is forced to use a serum to save his life. The serum gave Luther an ape-like physiology, greatly increasing his muscle mass and strength. In an effort to give him focus, Sir Reginald sends him to the moon to supposedly watch out for extraterrestrial threats, and Luther lives alone in seclusion on the moon base for four years while sending regular reports back to his father.

Following Sir Reginald's death, Luther is summoned back to Earth and comes to believe their father was murdered. As events unfold, Luther finds out that Sir Reginald never read any of the reports he sent back, and subsequently believes that he was a failure and was sent away for not being a good enough Number One, which takes a massive toll on his self-confidence.

Having been caught up in Five's failed attempt at dodging Viktor's apocalypse, Luther finds himself in Dallas, 1962. It is here he works as a driver for the owner of a burlesque bar, and occasionally uses his super strength to win rigged fights in underground boxing rings.

Luther is a loving, protective and righteous individual. He is shown to immediately throw himself in harm's way and act as a shield in dangerous situations and is shown to have a firm belief in right and wrong. He was the only one of his siblings to stay at the academy and continue his work as a superhero, trusting his father's commands implicitly. Luther is shown to define himself as the leader of the Umbrella Academy and as his father's "Number One", taking his role very seriously and devoting his life to his father's cause. As a result, he never left the Umbrella Academy or developed a life outside of it, becoming isolated and sheltered. He notably mentions that he never even had friends due to his dedication. As a result, he has a somewhat naive, almost childlike aspect to him. When he discovers his father has never read his reports from the moon, he is devastated and lost, feeling he wasted his life and causing him to spiral out of control and lash out by going to a rave, taking drugs and getting drunk.

Luther is a tall Caucasian man, standing at 6'5". He generally keeps his dark blonde hair cut short, accompanied by a five-o-clock shadow.

After being administered an experimental serum to treat a life-threatening injury, Luther's body took on a more simian appearance. While his legs grew a thick coating of dark fur, the effects of the serum were most apparent on his upper body: his torso and arms became broader and bulkier, with leathery hairy skin akin to that of a gorilla. To hide his ape-like appearance, Luther would wear high-necked shirts and fingerless gloves.

In the reset timeline, Luther's body has been restored to its original state, being muscular but with more human proportions.