In The Mansion, the "overalled men" of Frenchman's Bend regularly gather at Varner's store, to "squat or stand all day against the front wall or inside the store itself" (29).
On his journey to Europe in The Mansion, Chick has two unnamed traveling companions. He ends up traveling alone, however, when "at the last moment [they] find themselves incapable of passing Paris" (230).
The man who sells tickets to the movie at Jefferson's Airdome in The Mansion appears only as "a voice" that speaks to Mink "from the ticket window" (37).
This hypothetical character in The Mansion is the stereotypical witness who testified against a criminal who was convicted - and who that criminal is going to get even with at some point.