One of the things I really like about Diablo III is that many of the small NPCs (non-player characters) have their own stories. Such is the case with Mayor Holus, the rotund, well dressed, guy who players first meet in Act I of Story Mode.
I suspect that Mayor Holus was placed into the game, in precisely the spot he stands in, for functional reasons. He starts out as an intentionally unlikable character. Blizzard could have left it at that, but instead, actually wrote some character development for him. It is the little things like this that make the game so interesting.