Totheark

totheark is a group of individuals whose goals were to evade the Operator and enact revenge against Alex Kralie, then-believed to be the one responsible for the Marble Hornets production crew being afflicted with the Sickness. They also created a YouTube channel of the same name where they uploaded cryptic videos with hidden and/or coded messages, often in response to Jay's YouTube video entries.

While it was never explicitly confirmed if totheark was the work of a single individual or multiple individuals, evidence suggests it was initially the work of at least two people, the Hooded Man and the Masked Man.

History
TBA

Brian Thomas
Brian, as the Hooded Man, was a former member of totheark, as multiple videos have either alluded to him or appears to be created by him. After Alex Kralie began hunting down former members of the Marble Hornets film crew, Brian contacted Tim and enlisted his aid, forming the initial group as seen on screen.

More to be added.

Eventually, Brian discovered Tim's medical records and realized Tim was in fact responsible for their encounters with the Operator; he began to antagonize Tim and, when the latter was rendered amnesiac once again, Brian refused to re-introduce Tim back into the fold, making Brian the last remaining member of totheark. He continued to observe Jay and Tim's activities from afar, both aiding and hindering them while also foiling Alex's plans. In the penultimate climax, he uploaded one last video, "Null", indirectly addressing Tim and implying their end was near. When the two former friends confronted each other in Benedict Hall, the disguised Brian fell to his death, resulting in the presumed end of totheark.

Videos strongly implied to have been created by Brian/The Hooded Man are usually stylized with red and blue stereoscopic shading and visual distortions.

Tim Wright
Tim was likely a former member totheark, as several videos on their YouTube channel featured Tim in his Masked Man disguise, and he briefly worked together alongside Brian/The Hooded Man towards totheark's shared goal. Throughout the series, Tim's memories of Jay's investigation and his involvement with totheark, were consistently erased by the Operator, and presumably had to be reminded by Brian throughout their tenure together as totheark. When Brian discovered Tim was responsible for their affliction, the former effectively ostracized the latter from the group, repeatedly accusing him of being a liar. Despite the rising antagonism between them, their goals ultimately continued to align with each other; Brian, as totheark, continued to steer both Tim and Jay into their final confrontation with Alex. At the end of the series, though Tim was no longer a member of totheark, he ultimately succeeded in their goal to kill Alex, in "Entry #86".

Videos implied to be addressing Tim/The Masked Man are usually stylized with black and white film footage.

Possible Members
Many theorists of the original web series suggest that there is a third member of totheark, in addition to Brian and Tim, due to the differing styles of the cryptic videos uploaded to the channel, of which three distinct styles can be identified. The identity of the possible third member is currently unknown, though it is likely that it was one of the people who were involved in the original film production crew. It has also been suggested that the third member is the original member who founded the group.

Videos implied to have been created by this unknown third member are usually stylized with strong, distinct red coloring and symbolism.

Seth Wilson
Seth was highly suggested to be the unknown third member of totheark, before Alex killed him at some point during the series. He was the cameraman and co-editor of Alex's student film, indicating he had significant experience with camera and video work. Seth was also in possession of several tapes that none of the other crew member had, from which some footage were later used in few of totheark's videos. Seth's affiliation with the Red Tower footage also aligns with evidence that strongly suggest the third unknown member to be connected to the Red Tower. Alex revealed he killed Seth prior to his confrontation with Tim in "Entry #86", which could mean he failed to kill Seth before, who later went on and create totheark with Brian and Tim until his death.

"Skully"
An unknown figure wearing a mask bearing similarities to Tim's but with a block-shaped mouth with square teeth, nicknamed "Skully" by the audience, was briefly seen in "Entry #26", eventually speculated to be the third member of totheark. Though this figure nor the mask was never seen again throughout the rest of the series, the creators of the Marble Hornets web series confirmed that "Skully" was intended to be Jay's alternate masked identity, parallel to Brian's and Tim's, though the idea was eventually scrapped as the character never appeared on-screen again.

"Skully" later re-appears in the sequel comic series, confirming his existence to be canon.