stexpanded
You may also be looking for Great Link.

The Link is a M'Tar name for the role in which a programmed M'Tar clone or genetically engineered person acts as a link between a Liaison and the M'Tar, serving to process information whilst the Liaison remains in a waking state. Links can also be referred to as Treaties.

Changes in Body and Mind

The Link may undergo limited anatomical and physiological changes, which limit the amount of control he or she has normally.

The Liaison requires a Link to communicate with the M'Tar whilst in a waking state.

Specific Changes

When Ensign Garrett was altered for this role aboard the wreckage of the USS Artemis, she underwent the following changes:

Other Information

Hahn Jun-Seok (an undercover Na'arbi agent) once speculated there was only one Link; however, with the appearance of the Treaty Killers in 2372, this speculation was proven wrong. (Star Trek: The Cantabrian Expeditions: "White Flag")