Nalbis

Nalbis was a member of the Triannon race and a member of a religious zealot sect led by Pri'Nam D'Jamat.

He aided D'Jamat in hijacking the Enterprise in order for his religious faction to use the ship in a civil war aginst a rival religious faction. Implanted with an organic explosive, Nalbis was ordered by D'Jamat to sacrifice himself to demonstrate what would happen to Enterprise if Captain Archer refused to cooperate. Nalbis detonated himself on "C" deck, causing a hull breach and killing an Enterprise crewmember. 

Nalbis