Practor was the president-elect of Helotrix. He was native to the planet but had been on the Federation civil list for years. He had known Servalan prior to her fall from power and had been under arrest for a time during the purging of her followers by the restored High Council.
On his return to Helotrix, Practor was shown to his office by the General and met his liaison officer, Leitz. They told him about the adaptation programme that had allowed the Federation to conquer the planet and claimed the remaining rebel groups were wiped out, although Practor was somewhat sceptical. He recognised a portrait of Servalan in the office, identifying her to Leitz.
Later, when Practor was alone, Servalan, who was on the planet under her new identity of Sleer, accessed his private lift, entered the office and killed him to protect her true identity. (D: Traitor)