Jarth

From Memory Alpha, the free Star Trek reference.

Jarth was an assistant to Ves Alkar, a Federation Mediator.

In 2369, Jarth accompanied Ves Alkar to the Rekag system to mediate a civil war. He was unaware that Alkar was using females as 'vessels' to deposit his evil and dark thoughts so that his mind could remian sharp and pure. This process killed the female vessels. (TNG: "Man of the People")

Jarth was played by Rick Scarry.