The Half-Dalek was a Dalek-Time Lord hybrid that served in the Collective Victorious. They were the result of a fusion between a Dalek and an iteration of Romanadvoratrelundar from a version of the Warrior's universe, and were ultimately responsible for near-single-handedly destroying the Warrior's universe.
Biography
Origins
The two individuals that were eventually merged to become the Half-Dalek were a version of Romanadvoratrelundar who originated from a version of the Warrior's universe, and a Dalek who originated from a separate universe. The iteration of Romanadvoratrelundar remembered being "forged" into a soldier by their universe's version of the Warrior in their iteration of the Last Great Time War. They also remembered their universe's Warrior as having a "hagged face", similar to that of the Warrior that they eventually encountered in the Wilderness Beyond Time.
Following the destruction of their respective universes by their iterations of the Last Great Time War, the Dalek and Romanadvoratrelundar were both driven insane by the temporal flux they were left in. They were eventually found by the Collective Victorious and "gave themselves" to them. The duo were fused together and became the Half-Dalek. Romanadvoratrelundar lost most of their original identity in the process, being reduced to "a fragment of them[selves]". The Half-Dalek, like all members of the Collective Victorious, "pledged to destroy everything [they] could, universe after universe", with the ultimate goal of destroying all of existence, in an attempt to end their madness.
The Half-Dalek fought as part of the Collective Victorious for at least thousands of years, during which they formed the Fleet of the Final Family and helped the Collective recover from eons of stagnation after two separate instances of the Great Old Ones acquiring versions of the Key to Time. (AUDIO: The Key To Key To Time)
Annihilation of the Warrior's universe
to be added