Alice Manganese

Ah Fabius, you depraved little blasphemer!

Everyone in the Imperium believes there are only male Astartes, and within the Imperuim they are right. However among the Traitor Legions things get a bit more; fluid...

You were not even born male, you have always been a woman, growing up on a chaos forge world within the Eye of Terror, the galaxy's largest warp-storm. You worship the dark gods as a pantheon, your mark of chaos being that of 'undivided', and you know you are righteous in their sight. However you have always slightly favored Slanesh over the other dark gods (You like sex; but BDSM is not much fun...), and been wary of Nurgle (Being sick sucks.).

You lived a hard, tedious, but quiet existence on your forge world until the age of 7, working shaling coal at a coal mine, and going home at night to your parent's dormitory. You had enough to eat and a place to sleep, and your parents, though slaves, were overseers so you were never molested. Then you were sold to Fabius Bile by the mine owner and taken to be a subject in one of his experiments, trying to create female marines for an interested buyer among the Chaos Champions of the Alpha Legion.

The next 14 years were absolute hell, but you endured, and emerged from the other side a fully implanted and trained chaos space marine, even if you did have a pussy instead of a dick and tits on your chest. However while the experiment was a success the champion in question had been turned into a chaos spawn when he got in a fight with the Thousand Sons Legion and Bile simply auctioned you and the other survivors off to the highest bidders. This is how you came to be part of the 'Irradiators' Chaos Space Marines and received your new name: 'Alice Manganese'.

You are part of the forces of the 'Machine Prince' Damian Vorhapilos, almost as young as yourself at only 100 years old but already a rising star among the ranks of the 'independent' chaos leaders. He bought you and four of the other members of your experiment group, some of the ones that like you were not purchased as whole squads, but you are one of his favorites. The other favorite however is your bitterest rival, 'Cargo Decollete', and you know, just as she knows about you in reverse, that she has it in for you.

The Irradiators Chaos Space Marines are a very under sized Traitor Chapter, created by rogue Tech-Priests in the Imperium who were testing new designs for Space Marine equipment and vehicles and made 25 new battle brothers out of stolen Iron Warrior's gene-seed. This was their FIRST mistake. Their second was in their choices of test subjects: which included the son of a chaos cultist. Their third was in choosing that individual to be the test subject for a new dreadnought design they had thought up which was supposed to mimic the human form more closely but the end result was to make the child from the chaos worshiping family the most powerful member of their micro chapter and the only one who could hack into their computer systems with thought alone...

He turned the other test subjects to chaos, turned them on their captors, leveraged their power to seize control of the Chaos Cult, then conquer the world on which the experiment took place (also his birth world.), and after that made good his escape from the system with millions of Chaos Cultists and the survivors of his fledgling Chapter. Making for the nearest warp-storm, he found it had only a small traitor marine presence and he was able to set himself up as a major player, eventually contracting with Fabius Bile to raise a new 'Company' for his 'Chapter', which was how he heard about the auction and arranged to be a bidder, whence he got you. You and the other four members of your former 'company' that he bought were raised to be soldiers, but now also are intended to serve as 'comfort providers' for himself and his other troops, but mostly himself.

The Irradiators take in runaways from loyalist chapters and have several members of other legions, but Damian's total forces only number 50 space marine's or so, though he has thousands of trained and armed chaos cultists to back them up as well as numerous vehicles and warp altered beasts.