A "Chain" is a military unit, commanded by a Chainlord. Cenix seems to be on good terms with the overseers and owner who once considered you property and often borrows a few slaves for tasks he'd rather not have his soldiers perform.
The chainlord is a thick, black-skinned dwarf with a waivy black beard braided and hung neatly against his flat black breastplate. His deep black cape drags along the floor, leaving remnants of powdered bone in its wake.
It is known that he is a cleric of Chardun and thusly granted a high amount of respect. He is a military commander of some sort and often uses his military station to seize slaves for various purposes, often ending in their deaths. when the Chainlord is seen most slaves begin to fear for their lives and pray they are not chosen for special detail.