Emperor of the Restoration

Some accounts suggested that Dalek Emperor who led the Daleks in the age of the Restoration Empire following the close of the Imperial-Renegade Dalek Civil War, and onwards into the Last Great Time War, was a new Emperor, who had taken over the Imperial Dalek faction from Davros. He wore a golden casing with a large bulbous dome, deliberately harkening back to the Emperor of the bountiful, unified pre-Civil War Dalek Empire.

According to other accounts, however, the Dalek Emperor who led the Dalek Empire following the Civil War, and onwards throughout the Time War, was instead the Dalek Prime himself, who had, in the Civil War, been the ultimate leader of the Renegade Daleks.

Biography
During the Imperial-Renegade Dalek Civil War (PROSE: The Restoration Empire, TV: Remembrance of the Daleks) the Dalek Supreme who would later become the new Dalek Emperor served on the Dalek Council. After Davros fled the war, he exterminated all other members of the council and appointed himself the new Dalek Emperor. Modelling himself on a former emperor, he built himself a gold casing and augmented his brain capacity.

From this position, he sought to restore the Dalek Empire to its former glory through a new hierarchy of Dalek command and a new system of production. He restored Skaro (PROSE: The Restoration Empire) after it was destroyed by the Seventh Doctor. (TV: Remembrance of the Daleks) The new Dalek Emperor continued with Davros's plan for the Imperial Daleks to move against the High Council of the Time Lords, thus leading his armies into the Last Great Time War. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)

However, Dalek scientists began to uncover ripples in time which threatened the Restoration Empire, the invasion of the Archive of Islos was ordered, which unleashed the Hond. (PROSE: The Restoration Empire) The Tenth Doctor was captured by the Daleks to help against the Hond, having an interview with the Emperor; he recognised the Empire he was interacting with, who had never fought in the Last Great Time War, as "a paradox". (COMIC: Defender of the Daleks)