Chapter 1: 1 - G-Cells?
[G-Cell Nanomachines have successfully bonded with the host's cellular structure. The host can now gain access to their personalized quirk.]
Deus: Huh?
A boy of 5 years of age listens carefully as a strange robotic voice echoes in his head. The boy's name is Deus Rainheart and just a year ago everyone, doctors and even his bastard of a father, had claimed that he would ever in his life develop a quirk. The words quirk had once excited him to no end. But when he had been diagnosed as "quirkless", he had all but been left disappointed.
Deus is a very different child compared to others. He is a child gifted with memories of his past life. A normal person who became a somewhat successful smalltown business owner. An average and content lifestyle that carried on until the day he died in a car accident on his way to a concert with a potential future wife.
His small business was for entertainment. He sold books, comics/manga, animations, and he even had a small section set up for those who wanted to louge in and read or game while enjoying simple snacks and tea. Business was great and he did well for himself.
The best thing is the fact that he could enjoy himself along with his regular visitors. He made a respectable living of what he enjoyed despite others believing he could not. Deus was a gamer, reader, and lover of all things fiction. If he was not reading official material, he would partake in fanmade material as well.
Even with dying, Deus could remember everything clearly. Which is strange considering he had forgotten most things for the first 4 years of his life. Perhaps these G-Cells returned some of his forgotten repressed memories upon bonding?
[Initiating the G-Cell System. Now scanning host's biographical data... Scan complete! Displaying host's data.]
Deus: What is this?
A futuristic hologram screen appears before his eyes displaying detailed information about the boy.
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Name: Deus Rainheart.
Gender: Male.
Age: 5.
Nationality: North America.
City/State: Los Angeles, California.
Quirk: G-Cells.
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Quirk Details: G-Cells are special Nanomachines that have completely merged with the host on a cellular level. This essentially makes the host a form of bio-mechanical lifeform. Using these special G-Cells, the host is able to transform into a mechanical weapon known as a Mobile Weapon. Each G-Cell naturally produces a special form of energy that the host can use to power each form's weaponry.
The Mobile Weapons take the form of a mobile weapon the host remembers from their past life. This special quirk comes with the following abilities.
* Shift: Transforms into the form of a mobile suit. The more the host's G-Cells evolve the more higher performance suit forms can be accessed.
* Support: Allows the host to summon 1 or more mobile suits to aid the host in combat. The higher level of the G-Cell's evolution, the more support the host can summon.
* Fabrication: The host is capable expending specialized G-Cells to create resources in which the host can use to construct technology or other items. The host must understand the object in question's molecular structure before hand and the object cannot certain mass.
Other than those specific skills, the G-Cells also boost the host's natural functions passively. Increased metabolism, recovery, and mentality allows the host to get the most energy from their meals while also healing injuries much faster. The G-Cells essentially make the host's mind an organic supercomputer.
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As Deus reads through the information provided by his body's new cells, he cannot help but drop his jaws in shock. Even without shifting into the form of a mobile suit, his body would passively grow stronger thanks to the G-Cells and the strange energy they radiate.
Deus: Holy Shit! I can turn into a mobile suit! That's fucking sweet!
He reads through the rest of the skills.
Deus: I can also use the cells to create support units and even create materials practically from nothing.
Next he reads the passive gains from his quirk and smiles.
Deus: Also nice. Guess the increased mental facilities is why I can perfectly recall even the forgotten details from my past life. Beth's cute heart shaped birthmark behind her left ear, my 7th grade test results. All of it I originally forgot between dying and rebirth. It's all so clear!
Looking at the profile closely, Deus notices new information detailing his current skill levels.
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Physique: Coordinator Child.
Intellect: University.
Experience: Civilian.
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Deus: I have a Coordinator's enhanced physique. That means my overall growth will be phenomenal. My intellect stems from graduating from university back in my previous life. Very very helpful. My coordinator's physique will boost my intellect further than that since I am pretty much on New Game +... Damnit! I'm using game logic like Shigaraki!
He shakes his head and continues.
Deus: My overall experience is a no brainer. Never experienced a real fight in my last life. Let alone a shootout or anything of the sort... Wait a minute!
He glances at the protrait of himself in the profile page and notices a physical change that was not there before bonding with the G-Cells.
Deus: Why did my hair color change!?
His hair color did most certainly change. Unbeknownst to Deus, the change was a side effect of the mysterious energy the G-Cells emit and flow through his body naturally. The illustration is that of a 5 years old boy with medium length black hair with the tips highlighted with different colors. His hair resembles an aurora lighting up the pitch black skies of the night. Void black with a rainbow touch. His pupils are violet.
Deus: In a world of heroes and villains with all but 20% of the population have some sort of freaky quirk, I doubt mine would even be considered the weirdest. Don't know how I feel about the rainbow highlights though...
The holographic screen vanishes and the robotic voice echoes in his head yet again.
[The host can now transform into the following mobile weapons: RGM-79 GM, MS-05B Zaku I.]
Deus: Sweet! A good duo of beginner'd tier mobile suits. A GM and Zaku I. Now to figure out how to transform into-
As to answer his curiosity his body begins to shine brightly in a rainbow color for a few minutes. Once it dies down all that remains is a child sized robot with red and white paint. On it's head the robot's visor is violet colored just like his eyes.
Deus: Oh!!! I'm a GM!
He twists and turns to look closely at himself. Opening and closing his fist he can hear the sound of metal scraping metal. Bouncing around excitedly, Deus rushes out of his bedroom and makes a beeline to the bathroom to look at himself in the mirror. Not dwelling on the fact that he is making alot of noise.
Deus: This is awesome...
He says as he gently rubs his robotic face. He is grateful that his transformation was not into that of a building sized behemoth. That would have been awkward. Speaking of awkward...
????: Deus?
He turns to find his mother standing in the bathroom door. Smiling sheepishly, Deus rubs his head.
Deus: Hehehe! Hey mom. I can explain.
CREATORS' THOUGHTS 
SageGrimm
SageGrimm I wanted to do something different for a change so I decided to do a fanfic set in the world of My Hero Academia and give my OC a different kind of OP quirk.
so as a result I game him the ability to turn into a mobile suit. Instead of a building sized robot I chose to go for a sort of ironman style size wise. for quite a few chapters it will take place entirely in the U.S. but will visit Japan in the future.
Alot of OC and personal takes on how society deals with quirks multi-crossover.
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