In Skygear-01 Black Phantom you live in the year 3801 and control a bounty hunter named Giles, who lives wandering the space in his Loctus9 mother ship.
The Skygears are the most powerful fighting ships hitherto created, no one knows for sure the number of ships and so little what is the best, but what is known is that each module has distinct characteristics as the strike force, and delay between shots.
Each module also has special abilities, such as: Hyper-speed (ability to leave everything in slow motion unless you); Speed ??dash (ability to project to one direction at high speed); Black energy shield (ability to absorb impact without receiving any damage) and countless others.
Giles has a favorite Skygear, the M01, one of six rare Skygears what is known, and that in spite of very old and somewhat obsolete, is very agile and tough when it comes to fighting.
A few years ago Giles was involved in an incident caused by the mysterious Black Phantom, being unknown biological that destroyed several galaxies with his mighty army. Since then Giles walked away from his friends to live a solitary life, earning money as a mercenary, bounty hunter and participating in deadly races through space.
Still not sure which why Giles have chosen to become a hermit, but probably has to do with Black Phantom and cosmic apocalypse.