This is a list of all of the Fantasy Flight Games official Terrinoth Characters and from which expansions they are obtained.
There is a great deal of crossover between all of the Terrinoth games. Runebound, Descent, and Runewars have the same 12 starting characters except Descent which also includes the 8 characters from Island of Dread.
All of the Descent characters are present in Runebound expcept those from Well of Darkness. All of the Runebound characters are present in Descent except those from Midnight and the most recent release, Mists of Zanga.
Dungeonquest says on the box it's a game set in the Runebound Universe. The Dungeonquest game contains 6 characters with cards for Runebound, Descent and Runewars.