Im on a first watch mid s4 and this guy appeared at the start of this season as just one of the lead detectives I think? Its hard to know his role entirely especially since he sorta just shows up without an introduction, but people online talk about him like he's a big character.

Do we eventually get a story about him or is he kinda like Creed from The Office where he's just always there in the background saying funny stuff?

(I should also mentioned im usually stoned when watching so maybe I did miss something but im pretty sure I rewinded his first scene and didnt catch anything lol)

Someone mentioned in another post that het name was Emolia (eMOLEia) bacause she was a mole.

This may not be true (I hope it is) but is there anything else thats like this?

What comes to mind is when they cut the cameras to someone out of view. Eg, the guys are talking, and then someone says something about Lem being careful because he might die, then the camera cuts to Shane.

Or a song or a episode title that had signification meaning.