Adepta Sororitas Order:
Order of the Machine Heart

Heralidity: White armor with different colored robes for each squad. Sisters Technicas have red robes to show respect for Mars, however this color is not reserved exclusively for their use and squads may use red as their color. The Sisters Technicas use a Fleur de lis within a gear as their emblem.
Homeworld: The Forgeworld Hephaestus
Sisters Technicas: The Tech Priest of Hephaestus hold particularly strongly to the belief that the Omnissian is indeed an aspect of the Emperor. So strong that that they will call upon the emperor directly in their incantations. This causes some friction between the Tech priest of Hephaestus and those of Mars, but it makes relations between between the Cult Mechanicus and the Imperial Cult strong on the world. Local rhetoric holds that the divine emperor stole the gift of technology from the jealous elder gods and gave it to early man, and so the Emperor became the Omnissian. The jealous elder gods imprisoned the Emperor for this act, and it was that reason that he had to be born into the material world so he may take his rightful place as leader of mankind.
Sisters of the Order of the Machine Heart who show aptitude for technology are taken to the temples in the city of Pandora to learn the rites and rituals of the tech priest. These Sisters graduate to be Sisters Technicas and leaders of the Order. This is considered a great calling to be stewards of the Emperor's gift of technology. Every machine built or maintained is a heartfelt thanks to the Emperor, every secret unlocked is a Tribute to his greatness.
Servitors: The Adeptus Arbites of Hephaestus have a sense of ironic justice, so those who commit crimes against women are sentenced to Servitude Imperpituis and handed over to the Sisters Technicas. Their minds wiped and their bodies twisted to the Sister’s needs, these criminals must spend the rest of their ‘lives’ serving those they have wronged. These Servitors are used to manufacture the tools of war of the order. Some are taken by the Sisters Technicas into battle to fight and help with battlefield repairs.