Lukas (Ascension)

Lukastopherax, (AUDIO: Extermination) commonly known as Lukas, was a Chancellery Guard Commander, as well as aide and bodyguard to President Romana during her third incarnation.

Lukas was once a student at the Time Lord Academy, where he wrote a paper on secret societies.

Romana charged him to follow and monitor Narvin think that he might be betraying her. At the academy, he specialised in research about secret orders on Gallifrey including sects who worshipped Rassilon, Omega and the Other, so could tell Romana about the Adherents of Ohm. There was an assassination attempt on his life but Narvin saved him. He travelled with his president to Omega's domain but had never travelled through time before and found it disorientating. He remained back in Omega's domain to allow Narvin, Ace and Romana to escape. The domain started to collapse around him. (AUDIO: Intervention Earth)

Alternate timeline
A version of Lukas was also encountered on a different Gallifrey from an alternate timeline visited by Romana II, Leela and Narvin before any of them met the Lukas from their own timeline. (AUDIO: Emancipation)

Behind the scenes
Although his full name, Lukastopherax, comes from the Big Finish Productions audio stories Extermination and Intervention Earth, its spelling is pure conjecture.