Doorman

The Revelation Rally doorman was a supporter of the Equalists who used his size and deep voice to act as a doorman and security during the Revelation Rally.

History
On the night of the Revelation Rally, he was the one who collected the flyers that had the map to the rally as "invitations." When Mako and Korra arrived disguised, he asked them for their invitations. The two didn't know what he was talking about until Mako asked if the flyer was the invitation. He took it and warmly welcomed them as brother and sister. He was the voice who introduced Amon as he appeared to the audience. Later, while Korra was creating a steam cloud as cover for Mako to rescue Bolin, the man confronted her, asking her what she was doing. She tried to fool him by saying she was looking for the bathroom. The man didn't believe her excuse and took out his wrench and attacked her. However, she was able to avoid his attacks and used Mako's scarf to throw him into the pipes, causing a substantial amount of steam to pour out. He remained knocked out as this was occurring.

Trivia
The fact that he has a wrench and knew where Korra was could mean he is employed at the location and is an engineer.