Trinnolt Makken was a Human male born prior to 32 BBY. At one point in his life, he lost his left hand and received a prosthetic replacement. Makken served as a commander in the Imperial Navy but retired from service by 43 ABY, when he was appointed by the Galactic Federation of Free Alliances to be the Jedi supervisor of former Jedi Knight Tahiri Veila. The job of a supervisor was to shadow Jedi on their missions to help keep the Order in line. However, as Veila was no longer a Jedi, she resisted and took the matter to court. In the ensuing trial, the Galactic Alliance Court of Justice, led by Chief Justice Uved Pledesin, ruled with Veila. Makken was later put in charge of the Department of Justice's investigation into the death of interim Jedi Grand Master Kenth Hamner.