Lowly guard

The Lowly Guard was a Gondola guard till about a week before Sokka's and Zuko's arrival at the Boiling Rock. After being bumped up, he is now on the bottom of the prison guard totem-pole. He desperately wants to do his job right and make a good impression. In fact one of his mottos is: "No impression is a good impression."

History
When Chit Sang revealed to the warden that "a guy disguised as a prison guard, only, he's not a prison guard" came up with the master plan to escape, the warden ordered a line up. The lowly guard was part of this line up, standing at the left corner. When Sokka was added to the line, he tried to hide behind the Lowly Guard. He didn't appreciate this and violently pushed Sokka back.

His ultimate fate after the escape and the war is unknown, though it is likely that he just remained as a prison guard.