The following is a list of unnamed Triannon.
Suicide assassin
This Triannon was part of D'Jamat's religious faction who borded and took control over Enterprise NX-01 in November 2153.
Implanted with an organic explosive, he was ordered by D'Jamat to sacrifice himself to demonstrate what would happen to Enterprise if Captain Archer refused to cooperate. He detonated himself on "C" deck, causing a hull breach and killing an Enterprise crewmember. (ENT: "Chosen Realm")
This Triannon was played by actor Matt Huhn and is listed as "ND Triannon" in the end credits of the episode.