So… Ian, with his pretty, kind looking face, can’t play the role of a bad guy, just like Mr. Bean, with his comic nature and looks, wouldn’t fit the role of an evil murderer? Is that what you mean?
In that case I get your point, but I don’t think I fully agree. Sure, Rowan Atkinson probably only fits as Mr. Bean or a very similar character. But casting Bryan Cranston as Walter White in Breaking Bad worked so well at least partially because everyone knew him as the dorky dad in Malcolm in the Middle. And a lot of villains in pop culture have at some point been good guys. Characters change because of what happens to them during the story. And Ian, despite admittedly seeming like a typical nice guy at the start of the game, is no exception. He might not reach the levels of Eric’s dad, the thugs or Tyrone’s friends from GGGB, but that’s just because the nature of the game. Jeremy, Axel and the other guys probably won’t either.