With an (ironic) high-tech suit he designed, he can walk through walls, become invisible, evade nearly all scanning devices, and reprogram computers just by touching them.
He’ll sabotage technological corporation for free, though he often hires himself out for other corporations for the same end.
He’s fucking scary looking: look at that thing.
Later in his career he becomes even more unhinged, eventually not even bathing.
To recap: unknown name or background, walks through walls and becomes invisible, hates (possibly psychotically) technology and is an occasional mercenary.
Scary and badass.