Noble House Ko'Iron is one of the six Noble Houses of the Spire. Ko’iron has a powerful female line, and in contrast to the other Patriarchal Noble Houses is led by a series of Matriarchs descended from the maternal line. Far from the most powerful Noble House, it maintains its position in the Spire from the ownership of several ramshackle Hive City manufactoria districts and a few choice off-world charters. Possibly as a result, many well known Ko’irons are famous outside the House only for their political marriages to other Houses, and it is fitting that a gambling game is named after it: Ko’iron Six Card.

Nearly ten years ago House Delaque lost the lucrative Ko’iron Contract, severed all contact with the noble house on the sundering of this ancient deal and effectively stranding their agent Krelyn Delaque who had taken an oath to serve the Noble House while the Delaque-Ko’iron Contract was in effect.