[jet]

Maybe he is wary because he got picked on from the start and some of the HM's use him as a scapegoat eg, easy to nominate because he accepts it with good grace, unlike Ash and Steven. He stands up for himself but in a 'too nice' way. I think he's too controlled for his own good and as a result we don't get to see the real him. Plus he is hardly ever shown in the HL's so its hard for us to form any real opinion about him.
Who is he? I just don't know. He needs to be in the middle of a good storyline that breaks down his barriers before we can get an idea.