Tierna

Tierna was a Kazon and one of Seska's aides. USS Voyager answered a distress call from his shuttle in late 2372. He told Chakotay that Seska was dead and that he escaped by bribing a guard. Chakotay did not trust him, as Tierna was one of the Kazon that beat him when Chakotay infiltrated Culluh's ship. Chakotay's suspicions turned out to be correct, as Tierna was in reality a suicide bomber. He used a detonation needle embedded inside an artificial toenail and when he stuck himself with it, triggered a bomb that was embedded in his body and the explosion rendered Voyager helpless, allowing the Kazon to capture the ship. 

Tierna