Dedue was the first born son of a blacksmith from Duscur, a region northwest of the Faerghus capital Fhirdiad. A member of the Blue Lions and servant of Dimitri. His homeland was destroyed in 1176 during the Tragedy of Duscur, when the people of Duscur were blamed and persecuted for the assassination of King Lambert and other kingdom nobles. Dedue lost his whole family following the resulting pogroms against the Duscur people. After being saved by Dimitri, Dedue repaid Dimitri's kindness with a life debt, becoming his retainer even though many people of the Kingdom distrust and dislike him. Dedue enrolls in Garreg Mach Monastery Officers Academy in Imperial Year 1180 and joins the Blue Lions as Dimitri's retainer.