Dalek Time Commander

The Time Commander was a unique Dalek loyal to the Emperor, who headed 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, with one change being that Daleks had not fought the Last Great Time War. (COMIC: Defender of the Daleks)

Physical appearance
The Time Commander was a unique Dalek variant: it drove a casing which had the broad design of a Bronze Dalek but was painted a metallic grey. Its sense globes were the same gray colour, with a ring of blue at their base. Its indicator lights and the lens of its tele-eye were both white. (PROSE: The Guide to the Dark Times)

Biography
The Time Commander was placed in charge of the Time Squad by the Emperor. (PROSE: The Guide to the Dark Times) When they captured the Eighth Doctor, the Prime Strategist brought him before the Commander. The Commander explained their mission and the Doctor agreed to help them, travelling with them to Wrax to investigate its altered timeline. The Daleks were also interested in the Wraxians’ superweapon, the Devolver. Whilst the Strategist and the Doctor examined the Wraxians’ gallery, the Commander met with the Wraxian President, accompanied by the Scientist and Executioner. She agreed to consider an alliance and to demonstrate the Devolver, however then betrayed them and trapped the three Daleks. Realising she intended to use the Devolver against them, the Commander ordered the Silver Daleks to invade Wrax and they escaped. The Strategist convinced him to let the Doctor negotiate with the President and to accept the subsequent deal, that the Daleks withdraw in return for the Devolver’s dismantling and the Doctor telling them his theory on the source of the alterations. The Commander secretly sent the Executioner back to Wrax to use the Devolver to wipe out the Wraxians. Whilst the Doctor connected his TARDIS to the timeship’s engines to enable it to reach the Dark Times, the Strategist conferred with the Commander, believing the Doctor had been successfully manipulated. (AUDIO: The Enemy of My Enemy)

Psychological profile
Melody Malone described the Time Commander as "ruthless even by Dalek standards". It was "determined" to seize any opportunity awarded to the Daleks by the fluctuations in Time, willing to go to worrisome lengths to achieve its people's goal of supremacy. It was, however, "fiercely loyal" to the Emperor Dalek. (PROSE: The Guide to the Dark Times)