Gaia: A Nameless Number

In the year 2079, a genetic mutation has lead 45% of the human population to develop new inhuman abilities and skills; these people are known as Alters.
But what happens if that genetic mutation is forced, created with intent and not with nature?
You get Six.
Six is an 18 year old boy, born and created in a government test lab - an experiment to see if these new genetic limits could be increased.
Raised in secret by a government employee, Six lived almost solely in seclusion - only fully emerging into society at the age of 18 when he joined the Imperial Academy, 3 years later than other Alters of his age.
Even then, his identity was a complete secret; he was only told what he was allowed to know.
To the world, Six didn't exist... until now.
Until... they came.