Let me try to do a dramatic reading as Emmett to do his voice. I can't say I imagine him sounding anything like me, and he certainly doesn't have my accent, but, hey, let's try.
Mic quality sucks, and I stumble over my words a fair bit, but it's an attempt at least, haha. It felt like I sometimes slipped in a very bad Joker impression, which I shouldn't, haha. I don't think it reflects Emmett's voice really well, but it's for fun, sooo. The voice in my head is a bit high pitched, very in line with his childish personality.
http://vocaroo.com/i/s0LUH3SFw4og
You know what would be fun, if we'd try to voice each others characters. It'd be interesting to hear someone elses interpretation.