𝗢𝗿𝗶𝗴𝗶𝗻: In the year 4217, the home planet of the Kinecelerans, Kinet, began to build many planet-sized space stations with more concrete yet experimental systems of government. The largest station, Kinet VII, was ruled by the creator of this space station project, a Kineceleran with Anodite heritage and its new King alongside his loving wife, the fastest woman in the universe, and the son they had magically after spending decades together: A hyperactive, inconsiderate, magically-overpowered spoilt brat of a son by the name of Axel. He was magically infused with the DNA of a Vladat, an Amperi, a Methanosian, and a Chronosapien, and he was fed some story about how his father had many girlfriends before meeting the woman who would become his mother. He quietly stopped buying it around the age of eight in the way Earth kids quietly stop buying stories of Santa Claus, but he loved his awesome powers, so he didn't question it or his father's desire to groom him into the strongest galactic conqueror ever. However, combat, magic, and politics were not this child's only loves. He loved Earth, he loved Earth Culture, and he loved the old stories of Ben 10.
It was the year 4276. On his ninth birthday, Prince Axel Destiny Tracks asked for a mansion made of Taydenite, and his wish was granted. He then announced to the galaxy that whoever could build the greatest Omnitrix-like device and present it to him on his tenth birthday at the new "Omnicon" Omnitrix Convention he'd set up... would get this mansion as a reward. He asked for "An Omnitrix, only better", and the universe granted his wish. The Countrix, The Abilitrix, The Negatrix, The Deathtrix, The Artrix, The Creatrix, all of these were impressive, but not impressive enough. The contest's winner was irrelevant, as while many of the devices showcased to him sent shockwaves through the scientific community, Axel chose to act unimpressed, to the clear irritation of his parents. When it was over, he called the whole thing off and told everyone involved to go home and try harder next year.
Two weeks after the contest had ended, he contacted the creator of the Omnitrix-like device he considered the most impressive, an "Invincitrix" built by a young adult genius Galvan named Vulcas. That device could do everything the classic Ultimatrix could do, even artificially evolve creatures to their "Ultimate" forms. It also had a new feature: Whether the user wanted it or not, when it detected intense danger, it would automatically transform the user into whatever the device deemed necessary to ensure its user's survival, and form additional limbs taken from other aliens in the device's catalogue, though only for defensive purposes. It could even synthesize artificial strains of DNA to create new aliens if nothing in the device's Data Banks was up to the task. Axel offered him the mansion and a high-paying job as his new personal Royal Scientist if he built a new, stronger transformation device with every additional feature and unique gimmick the other Omnitrix-like devices boasted, with any glitches and negative side effects worked out. Plus at least 80% of a long, long list of requested features he left the Galvan with, some more physically possible than others.
To assist in controlling this monumentally complex device, Vulcas asked for the right to add an experimental and highly-advanced artificial intelligence to the device, able to clearly perceive the world around it, learn, and adjust its programming accordingly. Vulcas suggested that a 'Cute' female voice might be easier for the Kineceleran Prince to listen to than a synthesized and robotic duplicate of his own voice, and his wish was granted.
The device was finalized and given to him on New Year's Eve, right at the start of 4277.
Vulcas settled into his new Royal Scientist role nicely, but soon, Prince Axel realized the device's artificial intelligence was more than a mere supercomputer program. A living, unbreathing, young and female Ultimate Galvanic Mechamorph had been built into the device, and could not be removed without disabling all of the device's additional features until her return. In addition, the Absolutrix could not be removed from the user. To prevent catastrophic abuse of the Absolutrix's power, Vulcas had instructed this Ultimate Mechamorph to revert Prince Axel to his original form should he try and abuse any alien's power in any way, even in a harmless way. He couldn't use a Galvanic Mechamorph to upgrade and hack video games, he couldn't use a Merlinisapien to sneak into restricted sections of the planet's library, and he couldn't do anything bad, ever, unless it was for a good cause.
Prince Axel left his home and travelled the universe, searching for criminals to fight, problems to solve, and excuses to use his Absolutrix's power. He named the Ultimate Galvanic Mechamorph stored within the device Holly, after an annoying character from a show he loved before her introduction. And though he found her infuriating at first, as she started to prove her usefulness in wirelessly hacking and enhancing machines, he started to grow more tolerant of her, and she, in turn, started to develop a sense of humour. He had only a year to practice with this device before, on his tenth birthday, the universe went to heck, to put it mildly, and very politely. An ancient and invincible empire spanning several universes had come to conquer this one, and no hero, not even Prince Alex, could hope to stop them. In a last-ditch effort to save the galaxy, a Time Patroller by the name of Leotus arrived and aided him in travelling back in time to find new aliens and master their powers, so that he can one day return to his own time one day and save his future, in return for helping the lazy half-Saiyan Majini with her backlog of Time Patrol assignments. And though he puts on a smile and pretends nothing bothers him, this does, as does the fear that he may never become strong enough to save his universe.