Munn Li Compor (Foundation's Edge) He is a fellow councilor with Golan Trevize, the story's protagonist. Compor's family come from a small world called Comporellon in the Sirius Sector.
Compor betrays Trevize to the Mayor, and also follows him in his search for the Second Foundation. He is also an agent of the Second Foundation, an Observer, with limited powers, but able to report back on new developments. This is a new category of Second Foundationer, created after the near-disaster involving the Mule, whose importance was missed until it was almost too late.
Well-meaning, but weak, his role is secondary. He does, however, give Trevize a vital clue about the location of Earth by directing him to Comporellon, which he visits in Foundation and Earth.
Read more about this topic: List Of Foundation Series Characters