During the War of Heroes, Gloucester was one of the Ten Elites who fought alongside Seiros, the Four Saints, and the Adrestian Empire against the forces of Nemesis. Gloucester bore the Crest of Gloucester, a blessing from the Goddess, and wielded the legendary Thyrsus and Axe of Ukonvasara. After the war, Gloucester founded House Gloucester in the eastern region of Leicester.
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In truth, Gloucester and the other Ten Elites were allies of Nemesis, not Seiros. After Seiros prevailed over Nemesis and the Adrestian Empire completed its conquest of Fódlan, the Church of Seiros revised history. Gloucester's descendants became nobility of the Empire and later, the Leicester Alliance, passing down his Crest through the centuries.
In Imperial Year 1185, if Claude was sided with, a warrior named Gloucester served as one of the ten commanders of the army of Nemesis, who had been revived by the technology of Those Who Slither in the Dark. While Claude dismissed the idea that this Gloucester could have been the revived original, the fact that Nemesis himself was revived lends credence to the possibility that Those Who Slither in the Dark truly did preserve the Ten Elites and restore them to life. Gloucester, the other Elites, and Nemesis were ultimately defeated, thwarting the final revenge of Those Who Slither in the Dark against the people of Fódlan.
Gloucester is a south west english county, the name means "bright fort". It has origin in the old english "Glevo", meaning "bright", and Ceaster which means "town" .