Brian Thomas is a character in the ARG Marble Hornets.
He appears to have been a good friend of Alex's. He makes very sparing appearances.
His first appearance is at the beginning of the series in multiple tapes where it is shown that he is the main character for Marble Hornets, but is consistently annoyed and confused by Alex's attitude. When the tapes that Jay got from Alex end, it is unclear as to where Brian is or what happened to him.
In Entry #51, Brian innocently wanders about and gets several thought-provoking shots of himself wandering a burned down building that Alex plans to claim is Brian's characters old burned down school. During the shooting, Brian gets very uneasy, and asks Alex to hurry up, only to be assaulted by The Operator shortly afterwards. When the camera turns back on, Brian runs all over the building for Alex and stumbles across Tim who is coughing in the corner of a burned room. When Brian turns, The Operator is behind him and the video cuts again. When the video comes back, Brian is dragged off screen by an unknown figure believed to be Alex, while another figure (or possibly the same) picks up the camera and leaves him behind. It is uncertain if he's dead, potentially in a coma or unconscious, or could end up like Tim or Alex.
Entry #54 shows Brian once again, however considering he is okay in the tape (as is Tim), this tape must come before Entry #51. Here he waits with Alex in Tim's apartment while Tim goes off to turn the power back on. He is at the apartment to discuss what the movie trailers music should be. He is also in Entry #55, attempting to shoot a scene and talking with Alex and Tim about a potential shooting spot.
Not much is known about him until close to Entry #83, and even after the end of the series, many questions remain. Hoody has been seen in a several entries, the first time in Entry #39 where he first appears, stalking Jay while he sleeps in his car. In Entry #61, Hoody is confirmed to be at least one of the people posting to the Totheark account.
During Entry #83, Tim attacks Hoody, causing him to fall from a windowsill, seemingly killing him. Tim collects a tape from his pocket, which is shown, during Entry #84, to be the footage of Alex's auditions for Marble Hornets before he encountered The Operator. Brian is shown to be wearing the same hoodie during the auditions as Hoody always wore, leading Tim to believe they were one and the same. This theory was later proven to be true in Entry #86, which also confirmed that Hoody was indeed killed by the fall. In an interview for MarbleHornets, Troy Wagner, Joseph Delage, and Tim Sutton confirmed Brian to be Hoody.