The Boy was one of several 'special' children born randomly from mothers who had shown no signs of pregnancy. He (along with six others) was raised by Reginal Hargreeves to save the world.
00.05 was created by Gerard Way and Gabriel Bá.
Major Story Arcs
Umbrella Academy: Apocalypse Suite
00.05 was one of the children adopted by Reginald Hargreeves and hand selected to save the world.
00.05 looks like the Umbrella Academy's youngest, member but is actually its oldest and one of its deadliest. Lightning quick and surgically precise in his actions and with an unmistakeable panache. Before the Academy's first public appearance he ran away from home, or more appropriately ran away to the future. The future was bleak to say the least . It took him years to figure out the equation to allow him to travel backwards in time. one day it finally occurred to him in a hallucination and finally returned to his own time. Unfortunately he didn't go back far enough and arrived shortly before Dr. Hargreeves' funeral and his body had regressed to his twelve year old body. He finds out from Dr. Pogo that his body's cells aren't dying but no new ones are growing,essentially that his body is stuck in time. He and pogo go to coffee shop to talk and wind up encountering men in red costume with laser weapons. 00.05 quickly and messily evisarate his attackers and then departs with pogo but not before thanking his waitress. 00.05 returns to the mansion after Vanya attacked it and finds Hargreeves' monocle and a dead Dr. Pogo. 00.05 was present at the final battle and was responsible for stopping The White Violin by shooting her in the head.
Umbrella Academy: Dallas
00.05 reappears in the beginning of "Dallas" at a dog track after he lost, and is then immediatley ambushed by more of the red jumpsuited assassains that attacked him in the diner during "Apocalyse Suite", expect in greater numbers than before. He refers to them as the Temps Aeternalis" and then messily dispatches them all. But not before the last surviving member calls in for back up in the form of Hazel and Cha-Cha. 00.05 immediately freaks out and blows the man's head apart , but the back up order was confirmed and Number 5 states in shock, "we're already dead."
The Rumor tracks Number 5 to a seedy motel where a chimp dressed as Marilyn Monroe is singing "Happy Birthday Mr. President" to him. The Rumor tells him that she wants to know what is going on.
Rumor and 00.05 go on a walk to discuss the years he was missing and he reveals that he encountered the time enforcement agency known as The Temps Aeternalis and his superior was apparentlly a sentient goldfish in a exo-skeleton, he was subjected to various horrible surgeries to improve his physical performance. He was made an agent and did assassinations for them. years later he found out that he was indirectly responsible for every major assassination of the past century. When he found this out he fled, The Rumor doesn't believe a word of this until the goldfish appears and tell Number 5 he will assassinate his mother if he doesn't . He invites Rumor to come. When she asks why she should care the goldfish reveal 5's mother is going to have twins.
Number 5 and go to the Temps headquarters and arrange a plan to make 00.05's past self go through with the assassination of JFK. They set up shop right out side of the book suppository in Dallas, to arrange the death of John F. Kennedy. Shortly after wards in the past things don't really go to plan as 5's past self kills most of the agents , past 5 doesn't go through with assassination as before and it's reveal that Rumor assassinated Kennedy after all after the Temps surgeons restored her vocal chords When they returned to past Carmichael (the goldfish) is waiting for them with ice cream. When 5 asks about what will happen to him Carmichael brushes him off. Enraged 5 smashes the glass container in the head of Carmichael's exoskeleton that houses his fishy body, and tells him off before eating him alive, thoroughly disturbing everyone who witnesses this (surprisingly enough Séance). he then has some ice cream with his new puppy. He also mysteriously finds the model earth from his diorama in his childhood.
00.05 is capable of jumping forwards in time. He can simulate super-speed by making micro jumps. His DNA has also been fused with that of several of history's most dangerous killers. He does not age.