Lyaal

From Memory Alpha, the free Star Trek reference

Lyaal was a Triannon male who served under D'Jamat. In November of 2153, he assisted D'Jamat in seizing control of Enterprise. He was captured by Captain Jonathan Archer, who took detailed internal bioscans of him to enable Doctor Phlox to find a way to disable the Triannon organic explosives. (ENT: "Chosen Realm")