Greyfield, ジギスムント (Zigisumunto Sigismund) in the unreleased Japanese version (Famicom Wars DS: Ushinawareta Hikari), is a Commanding Officer in Advance Wars: Days of Ruin, the self-appointed leader of the New Rubinelle Army.
Greyfield serves as an early ally and later antagonist in the Campaign mode.
His stats are focused primarily on naval combat but because he doesn't boost ground units or receives a significant benefit from his CO Power he is considered by many the weakest CO.
Greyfield is the self-serving and power-hungry leader of the New Rubinelle Army. He upholds the long-time grudge between Rubinelle and Lazuria without a second thought.
Greyfield thinks highly of himself and no one else; he aims to be the leader of the world following the meteorfall and allies with Caulder when presented with the opportunity, but he is largely incompetent by himself.
Naval units, Sea Planes, and copters receive a 10% attack and 40% defence boost. Radius: 3.
Resupplies fuel, ammo, and materials for all units.