Setting: Warhammer 40k.
General info: Roboute Guilliman is the Primarch of the Ultramarines Space Marine Legion and its myriad subsequent Second Founding Successor Chapters. He is considered one of the greatest military minds the Imperium of Man has ever known. A statesman as well as a warrior, Roboute Guilliman strived to create an empire where humanity could prosper free from the tyranny of aliens and the perils of the Warp. He enacted the proud concept that gave the Imperium its most common name, the Imperial Truth. However, the Imperial Truth was ultimately devoured by the internecine horrors of the Horus Heresy and its aftermath, forcing Guilliman to reluctantly replace it with the Imperial Creed - an acceptance of faith in the God-Emperor as embodied in the Ministorum's state religion. Guilliman was mortally wounded during the Battle of Thessala in 121.M31 while in single combat against his traitorous brother Primarch Fulgrim. His body was preserved in a stasis field for nearl