what I'm getting from wikipedia:
Proteus is one of the main characters is two gentleman of verona. He is, at different times, in love with Julia and Silvia.
However, looking closer, it's unclear as to if Proteus is actually a hero or a villain. Early on, he is to marry Julia. At the same time, his best friend Valentine is in love with Silvia. Proteus decides to scorn Julia, and connives to take Silvia from his best friend. Quote from a website: "The character of Proteus clearly presents a problem because audiences have a hard time believing (1) that his love can change so drastically in mere seconds and (2) that he will severely betray a true friend in order to win Silvia."
"He begins as a hero, turns into an antihero, and attempts to convert back to a hero when he says to Valentine, Silvia, and Julia “‘Tis true: O heaven, were man but constant, he were perfect. That one error fills him with faults; makes him run through all the sin; Inconstancy falls off, ere it begins. What is in Silvia’s face, but I may spy more fresh in Julia’s, with constant eye?” (5.4.109 114)
In order for The Two Gentlemen of Verona to be successfully performed, audiences must believe in both Proteus the hero and Proteus the antihero.Both are essential to the believability of the character as a whole.
Hmmm. So he could be a town, or a scum character.