Foil
A dramatic character who enhances or deflates another character by contrast. Based on the literal jeweler’s foil, or black velvet cloth held behind a piece of jewelry to allow it to shine in contrast. Horatio, in Shakespeare’s Hamlet, represents the definitive foil to Hamlet. [[1]]is a character who is different from another character and the foil character's difference highlights the qualities of the other character, which most of the time is the [[2]].Another way to interpret a foil character would be to explain them as a [[3]]with a contrasting personality.