Dalek Executioner (The Guide to the Dark Times)

The Dalek Executioner was a Dalek Executioner and member of the Time Squad, a battalion of Time-Sensitive Daleks deployed by the Emperor to attempt to make history more favourable to the Daleks after a divergence in the timeline was detected, (PROSE: The Guide to the Dark Times) which rewrote history so that the Daleks had not fought the Last Great Time War. (COMIC: Defender of the Daleks)

Physical appearance
The Executioner's casing was a unique Dalek variant: it had the broad design of a Bronze Dalek but had a dark, gunmetal-grey base unit combined with a black dome and slats (PROSE: The Guide to the Dark Times) similar to one of the Emperor's Personal Guards. (TV: The Evil of the Daleks) Its black sense globes were ringed with crimson its eyestalk's lens likewise glowed red, while its luminosity dischargers were yellowish. Instead of the familiar plunger-like structure, its manipulator arm ended in a three-fingered "claw", each "finger" resembling the blade of a scythe. (PROSE: The Guide to the Dark Times)

Psychological profile
Melody Malone described the Executioner as "exceptionally cruel". Adept at torture, it was always willing to inflict pain on other beings to get what it wanted. In battle, it "always shot to kill", to the point that it would sometimes disobey orders for the sake of finishing off an opponent. (PROSE: The Guide to the Dark Times)

Behind the scenes

 * Speaking of his portrayal as the Executioner, Nicholas Briggs described him as "completely mad".