Halvak

Halvakendotorindaius was the former Supreme Treasurer of Gallifrey and an enemy of the Doctor. At his core, he was an anarchist who revelled in chaos, and wanted to see those who he did not like or trust suffer, preferring to deceive his opponents. He was also a fierce extremist, believing that Time Lords had become soft on the rest of the universe and should rule over it as overlords.

Prior to the Great Converging
Like all Time Lords, Halvak was taken from his family at the age of eight for the selection process in the Drylands. Staring into the Untempered Schism as part of a Time Lord initiation rite, Halvak was inspired by what he saw in the Schism. (PROSE: A Brief History of Time Lords)

Halvak had been the Supreme Treasurer for many years, his innocent and charming nature making his position nearly irreplaceable. He was known to be supreme treasurer during the "incident with the Vardans" (TV: The Invasion of Time) and knew about the Master and Chancellor Goth's roles in a previous Lord President's murder, having read the files. (TV: The Deadly Assassin). He was one of the most trusted members of the High Council, and recommended that Spandrell once again fill up the mantle of Castellan after Kelner was removed from office for corruption. (PROSE: Doctor Who and the Sealed Orders)

The Great Converging
When the Doctor's TARDIS landed on Gallifrey to allow Romana to leave, Halvak sent a saboteur to enter the TARDIS when nobody was looking and destroy the TARDIS' randomiser to try and destroy the web of time to the point of no return. His plan succeeded, and several alternate versions of the Doctor and Romana appeared overtime. Halvak opted to help the CIA, and the Chancellery Guard, led by Spandrell and Andred, in their investigations. All the while, he kept up the façade of being innocent and oblivious to bluff his way out of being thought of as a suspect, instead getting the Vice President incriminated. He also made communications with his agents private, so as not to attract attention. When his actions were discovered through K9, Halvak would intercept the news and try to have K9 dismantled before any harm could come to his reputation. However, in doing so, Halvak inadvertently ousted himself as an anarchist intent on causing great amounts of damage to those who may threaten him and how he deemed Time Lord society ought to be. He was stormed in on by the Doctor, Romana, K9, Spandrell and Andred, who placed him under arrest, with his trial to be had at a later date. His role as Supreme Treasurer was filled by Romana. (TV: Sealed Orders)

Personality
Halvak was shrewd and calculating, willing to manipulate others into doing his bidding. He believed that Time Lords were superior to all other beings, and that they had grown soft through their policy of non-interference. In his mind, the Time Lords should have been the masters of the universe, and acted as overlords or gods over what he deemed "lesser undesirables". (TV: Sealed Orders)

Prior to the Great Converging, Halvak maintained a façade of being childishly innocent and often oblivious to current events, as he believed that keeping the Matrix in top shape was most important. Because of his apparent eager willingness to do his job and better the lives of those on Gallifrey, Halvak was thought of as being incredibly likeable and often got his way. This included his petition to have Castellan Kelner replaced with the previous Castellan Spandrell. (TV: Sealed Orders).

Physical Appearance
Halvak sported unkempt, shaggy black hair and a perpetually worried face. Unlike many Time Lords, who were clean-shaven, Halvak had noticeable stubble. (PROSE: Doctor Who and the Sealed Orders). He had brown eyes. (TV: Sealed Orders)

Season 18

 * Sealed Orders