Liator was an Edo male who lived during the mid-24th century.
In 2364, when the USS Enterprise-D visited Rubicun III, Liator was the primary representative, along with Rivan, to greet the away team. He was also the lead negotiator when an impasse was reached over a crime committed on the planet by Wesley Crusher.
Liator was angry that the Federation claimed to respect laws but was willing to take Crusher from the Edo instead of allowing him to face punishment for his crimes. (TNG: "Justice")
Liator was part of Commander William T. Riker's memories while being infected on the surface of Surata IV and treated in sickbay. (TNG: "Shades of Gray")