[b]Scent [/b]- Greg's not a smoker, but he's not exactly a very hygenic person - he showers every once in a while and he's not very active, so I wouldn't call him gross, but he definitely doesn't really care about how he smells, so your character with sensitive smelling might notice that about him.

[b]Voice[/b] - His voice is higher pitched and wavering. He 'ums' and 'ahs' a lot, and he tends to abort a lot of sentences before he finds one he wants to finish. He's got an Idaho accent, which is to say not really an accent at all (he probably says the words 'mountain' and 'pecan' funny). 

[b]Body[/b] - Greg fidgets constantly. Constantly. When he's nervous, which is always, he tends to hold his arm or scratch his back. When his telepathy his bothering him, he rubs his glasses a lot.