Basically this character has the voice and disposition of a teenager who thinks the world is utterly hopeless. The, hipster kind of kid who listens to music and uses the word dapper both ironically and unironically at the same time but still manages to be emo. A deep, somewhat nasally voice that is in an almost constant, bored, sigh. A bit of cynicism added mixed in might help your performance stand out a bit, as long as it doesn't seem too mean.