The Warrior

The Warrior was a version of the War Doctor from an alternate timeline had the Fourth Doctor fulfilled his mission of altering the creation of the Daleks.

Biography
In a version of history, Sarah Jane Smith successfully convinced the Fourth Doctor to go through with destroying the Daleks. After doing so, the two and Harry Sullivan tried to escape via the Time Ring, but both Sarah and Harry were killed by a prototype Dalek. The Dalek also shot the Doctor, but he was extracted from time by Narvin just before the blast could fully kill him. This left him slowly dying, but Narvin provided the Doctor with the last Elixir of Life of the now destroyed Sisterhood of Karn, triggering the Doctor's regeneration into the Warrior.

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Personality
Like N-Space's War Doctor, this incarnation of the Doctor had abandoned the name "Doctor".

Appearance
The Warrior resembled N-Space's Sixth Doctor, but his attire resembled his N-Space counterpart's ninth incarnation. The Warrior wore a brown leather trenchcoat and a dark green-brown, double breasted moleskin waistcoat with 10 brass buttons and a fob chain attached to it. (AUDIO: Aftershocks) For neckwear, the Warrior wore a scarf knitted in a burgundy and ivory herringbone pattern. (AUDIO: The Difference Office)

Behind the scenes
As shown on the trailer of Genesis, the Warrior's TARDIS' interior resembled that of the Fifth, Sixth and Seventh Doctor's console rooms, but in disrepair and beginning to collapse in on itself.