It's Erlend Caspersen actually.
He's got a great technique and can reach incredible speeds and I'm a fan of him, however, IMO, his biggest weak point is that he usually doesn't know when to play simple bass lines.
Sean Malone says "in general, the bass part should support the rest of the band but also have an identity independent of the other players. a good bass line has the perfect combination of those two elements. don't think you have to overplay to get attention, by letting others shine, you shine yourself." and that explains the whole deal for me. Erlend has to do a bit work on balancing the overplay thing

, but like I said, that's my opinion.
Oh, by the way, his tattoo on his right arm looks fantastic while playing
