And that's it for basing tonight; the Boys from Blaster Bay, bases done.
Hive-worlds are heaving with gangs, there's no escaping it. A gang-free hive-world is like a heresy-free xenos, it's a nice idea but in reality it's just not going to happen. Jamming that many humans into that little space has its inevitable results; every hive-world in the galaxy has gangs, even Holy Terra, and Mechanicus forge-worlds are just a particular kind of heavily industrialised hive-world.
In true Mechanicus fashion, the Admech treat forge-world gangs as just another resource, to be utilised wherever proves applicable. The variant of the Imperial faith followed by the civilian populations of forge-worlds such as Ryza fails to differentiate between a tech-adept and an Eclessiarchial priest: to the mind of your typical Mechanicus menial or forge-world ganger, instructions from a high-ranking member of the Mechanicus might as well come from the Emperor Himself, and will typically be obeyed with the sort of fanaticism more normally seen being whipped up by an Imperial Confessor.
From the gangs the Admech recruit both menial labourers and more advanced personnel; numerous tech-adepts began their careers in the underhives of forge-worlds, as do the vast bulk of the Skitarii and significant numbers of servitors. From time to time, a tech-adept will for whatever reason recruit forge-world gangers as-is – normally because the tech-adept in question is having trouble recruiting anyone else, sometimes because the tech-adept considers the ganger a usable asset just the way they are, and sometimes a bit of both.
In the case of the Ryzan gang called the Twisted Nex, their recruitment into the service of Magos Viktor von Frankenstern came at a low ebb for the gang. A run of bad luck, getting the worse end of events in a string of confrontations with their long-term enemies the Southside Kill Krew, an idiot who should never have been allowed frag grenades, and a drunken argument got way, way out of hand had left only two of them alive – heavy Little Kane and juve Mitzi McKade – and with hits out on them from the Southside Kill Krew they weren't likely to find places in other gangs either.
Their fortunes did an abrupt 180 when von Frankenstern, hotly pursued by the Southside Kill Krew and a rampaging Praetorian servitor, came crashing through the door of the watering hole in which the two were trying to decide what in the Emperor's name they were going to do to keep body and soul together.
Two absurdly violent hours later as they and he escaped the area aboard a groundwheeler that used to be the Southside Kill Krew's leader's second most prized possession (being driven by someone who had up until a few minutes ago been the Southside Kill Krew's leader's most prized possession) when von F offered them positions in his retinue their answers were all but a foregone conclusion.
L to R; J.D, Mitzii McKade, and Little Kane (who got the nickname on first joining a gang at age eleven) in front of J.D's car.
Like a lot of forge-world gangs, the Twisted Nex members have considered themselves Mechanicus personnel since early childhood, and use gang symbols and colours clearly derived from Mechanicus iconography such as the crude variant of the Machina Opus seen here; this symbol is repeated on the backs of the gangers' leather jackets.
And, an overview of the three and the car.