Johanna is the 2nd newest of Marvin's slaves, after Former Drill Seargent Jefferey Peters.
It is unknown her exact date of birth, although she is believed to be in her early-to-mid twenties, a 'Nomad War Baby', as they call them. She is five foot nine and around 115 lbs, with bright blue eyes and drab, blonde hair.
She was accquired during Marvin's codenamed psuedo-covert operation "Dirty Deeds Done Dirt Cheap" (Post #9, Dirty Deeds Done Dirt Cheap) when she was in her teens, one of the most expensive ages to buy a female slave, for... obvious reasons.
The mission itself was planned by Marvin and his AI Heartless, to get revenge upon the Slaver only known as "Giraldo" aboard his own ship, the Fortune of the Night. He would lure Giraldo on the guise of wanting to acquire more slaves, which, in itself, was not at all a lie, as Marvin planned to 'buy' more 'indentured servants'...
He just never planned to pay for them.
This revenge mission was caused by a dispute between Marvin and Giraldo several years earlier, over a young girl, 'ripe' at the age of 13, for the 'service' business. Marvin won the bid easily, over the few creeps and weirdoes that came to that particular meeting.
It was not the regular crowd of rich, affluent, secretive government officials or pervese Junkers looking for a cheap good time. Marvin should have expected something, or at least found something odd.
This meeting was not advertised for a very good reason. This girl was tainted.
Giraldo wanted to teach Marvin a lesson for cheating him years even before the above incident, on some very 'approachable' 'clean' 'fresh' 'property' that Giraldo had acquired from an charity orphanage on Planet Los Angeles. The only reason Giraldo continued to deal with Marvin after being swindled is because Marvin was his highest paying customer, and a regular one at that...
The girl was infected with a very nasty, possibly deadly, STD that would render Marvin impotent, among other things.
Luckily, while they may be slaves, Marvin tests every single one for any kind of infection, slaves aboard his juggernaut Glorious Advance have nicknamed it 'Bleaching'. It was originally put into place due to the Magnetar Incident, of whose near entire report has been classified by Marvin, due to possible Order intervention if they'd ever found out just exactly what happened...
Marvin ejected the girl into space, and swore revenge.
Johanna was one of the few slaves that Marvin 'purchased' before the Fortune of the Night exploded. Unfortunately, her sister Yolanda was not so lucky, and this pushed the already mentally unstable Johanna into deeper psychosis.
Johanna's origins are, again, quite unknown. Marvin did not acquire her 'papers' before the Night exploded, a process that would normally occur after purchase, which itself did not happen.
She is most likely from Planet Houston, as her right wrist carries an identification tattoo that ties her with a now-closed insane asylum on the Planet. Patient medical records are classified by the Liberty government, so the exact nature of her psychological state is unknown.
When she acted out, or acted, well, crazy... Marvin would merely try a different drug every time.
Eventually, one worked, a potent antipsychotic prescribed only for the worst cases of paranoid schizophrenia, named Lorpralorazamathol.
Everytime Marvin requires her 'services' he loads her up on the stuff, to the point she is nearly commatose. While it is not expected she will last long, Marvin is not afraid of losing her as he is with several other, more physically and mentally capable slaves he has in his possession.
And if she ever does escape...
Marvin can always pick her up at one of the many asylums that are bound to discover the extent of her mental illness...