He looks like the kind of guy who would fry someone with a beam of light in a heartbeat. (For those who didn't pick up on the fact that I meant a light saber, you know now.)
Boy... not many of you guys have seen the show Taboo on the National Geographic channel, have you. Like HardDickensCider said, those 'horns' in Devin's head are actually body modifications. They put impants under the skin to raise it up and fashion into a rather bizarre look malformity that makes them look rather unique amongst others. It's a rather rare occurence for ordinary individuals to see, but it's pretty common, from what I can tell, around the body modification scene. :3
Logan reminds me of Wolverine (it's obvious).
Sasha reminds me of just about every hula-girl out there.
Moira reminds me of some one that'd be into Devin's goods, as well as Natasha's.
Ian reminds me of ... some peasant with a hat and a cat.
Edmund reminds me of a crime boss.
Liam reminds me of a totally tubular surfer dude!
And... the Von Helsons reminds me of the Hiltons. :3
Well, Logan is Wolverine, there's certainly not any doubt about that.
As for the Devin thing, I'm going to have to agree that he does look like Darth Maul in a way. Probably just because he's covered in tattoos, of course; if the tattoos weren't there then I don't think the similarities in appearance would be quite as obvious, if at all.