C - Heretek
You went by the name of Magnus Kegback from birth until your induction into the Mechanicus whereupon you became known as Adept Kegback, your years in the Mechanicus were long and harsh for you could not quite grasp the ideology and beliefs that the Cult Mechanicus followed. You would ask yourself why it was that they spurned, and forbid innovation when such progression had not been seen since the Dark Age of Technology, when such advancements would let their creators go down in history as geniuses and heroes for returning that which was once lost to time. It was those very thoughts that led you to flee that world, to flee from the Mechanicus who would execute you for the supposed crime of progression, and come to this fortress world where you could perhaps manage to change so very much. If you started off small it would not be long before your so called tech-heresies were spread throughout the sector shining a new light on advancement, and opening the way for those like you who would seek to return the mechanical glories that mankind once had to their hands again.
Ensuring that no other people were in your section of this large-scale passenger transport you pulled out a dataslate from the depths of your robes, and powered it up to reveal what little information you had been able to gather on the planet from one of the service terminals on board. Your destination was one of the three planetary capitals, Naraxus was its name according to your info, and according to the data there were two major towns in the vicinity that operated transmission and air traffic control towers (the towers lead you to assume that's why there is even any data on these two towns on board). The first town is a mining town by the name of Brackston that lay out in the open plains south of Naraxus while the second town appeared to be focused on fishing, and lumber industries as it lay to the north west of Naraxus and was bordered by the jungle to the west, and ocean to the south. Looking through the rest of the data you'd managed to scavenge you find it to be largely useless being little more than flight manifests.
Somewhat annoyed at the lack of information on the ship's computers you put the dataslate away with a grimace, and take the time to admire the one thing you had managed to save before fleeing from the Mechanicus' hunting dogs.
That which you managed to save is ...A) A Combat Servitor - One of your early creations, and considered well within the bounds of what the Mechanicus found allowable this Servitor was crafted from a former Imperial Guardsman who had become unable to take part in combat any longer due to severe injuries. Aside from the standard implants required to create a servitor you expanded upon the basic augmentics replacing all of the limbs with high-quality cybernetic replacements, advanced vision augmentics allowing for effective fighting capabilities in almost all situations, and most importantly of all the implanted bolter that replaced most of the servitor's right forearm.
B) A Servo Skull - This Servo Skull had been given to you by one of your mentors back in the Mechanicus, and you wasted no time in setting to modifying the seemingly skeletal machine to fit your needs far better than the thing had been before equipped with only an auspex. In your workshop you quickly modified it to be a much more complete work by expanding upon the built in cogitators, adding a combi-tool, a pict recorder, and numerous tendrils and mechadendrites to allow it to better interface with the machinery you dealt with on a daily basis. Almost as an after thought you built in a compact laspistol for it to use, while it certainly didn't have much stopping power it'd be enough to surprise your assailants for a few moments at the least.
C) Grav-Revolver - A Grav-pistol, a firearm that turns the very mass of your target against themselves as it manipulates gravity itself to crush the foe. This weapon is not that, but is considered perhaps your greatest tech-heresy as you created it from scratch, the secrets of the creation of the true thing locked away from your reach, even that was not enough to stop you from the attempt. While you failed in fully replicating the actual weapon you've managed to come close developing a weapon from a common civilian revolver that was capable of firing rounds shrouded in graviton particles. While it won't effect damage on the level of a true graviton gun it will have a close enough effect, and the larger the target the better the results.
With your observations at an end you feel the shuttle's thrusters roar into life, and exert considerably more force on you then you had felt up to this point, at least it was a sign that your journey was finally at an end. All that you needed to do now was start your work, but how to go about that is the question ...
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And with this character creation will be completed, you guys are free to do as you see fit to try and create a Chaos Cult by any means you believe will work, so feel free to begin the mad plans