Diedrich Greyshade held the rank of Moff within the Commonality. Being a relative of Simon Greyshade, specifically a cousin, Diedrich utilized his sway to ensure Simon was never found responsible for the demise of their cousin, Jheramahd Greyshade. This allowed Simon to rise to the position of Senator representing the Commonality. Following the dissolution of the Imperial Senate, Simon Greyshade relinquished control of the Commonality to Diedrich.