Tim is a level-headed, cautious person, but he is not afraid enough of his advisories for them to disable him. He has a good sense of humor, which he uses often to make light of certain situations; he seems to be a calm individual on the outside, hiding the fact that he is a scared man who only wants to escape from the hell he is in. He appears to be very distressed and extremely upset over his condition, having huge blackouts and being unable to awaken for long periods of time, with no recollection. When Tim experiences blackouts, he assumes the persona known as the Masked Man, a separate entity that manifests primarily when exposed to the Operator. This transformation explains why Tim has no recollection of his actions during these periods. Masky, characterized by his silence and the mask he always wears, displays violent and animalistic behavior, often acting as an “attack dog” when working alongside the Hooded Man. Tim is known to be secretly sensitive to things; it is unknown whether the Masked Man is the same, but as he wears the mask, it is difficult to tell, although he may have similar feelings over his condition and everything he and Tim go through. References throughout the series suggest that Tim may suffer from Multiple Personality Disorder (MPD), a disorder that could account for the distinct separation between his calm, reserved personality and Masky’s volatile, predatory nature. However, it could also be the influence of the Operator, which is left for speculation. Throughout Marble Hornets and in the tapes, it as implied that Tim may have been stalked by the Operator since his childhood. His connection to the Operator may have been the domino effect of the series where everyone indirectly got involved. Tim was diagnosed with schizophrenia as a child. Tim smokes cigarettes. Tim showed signs of health problems (e.g., coughing, headaches). He has his fair share of mental problems. He has the inability to feel happiness. But he’s one of the best people to be friends with, protective, supportive, helpful, will help you no matter what especially if it’s mental. But that’s only if you’re bff’s with him…he’d never admit that. Genuinely a nice person.

Alex was originally described as being enthusiastic and rapturous, though the videos from the Marble Hornets filming in 2006 display his descent into madness, paranoia, anger and other forms of psychosis. After being stalked by The Operator, it is shown that he is very brutal, violent, and aggressive, incapacitating several of his friends in various videos, including Tim, Brian, and Jay. It can be assumed that he killed Seth and Sarah as well, and it is revealed later in the series that he even killed his girlfriend Amy after she came into contact with the Operator. His violence is shown in great detail when he assaults and murders a man outside the tunnel. The greatest explanation of Alex's personality likely comes during Entry #86, where he sees himself as a force of good. Apparently having discovered The Operator's memetic spread, he takes it upon himself to kill everyone who has come into contact with The Operator, and save the planet. As Tim points out, however, The Operator is likely using Alex to spread further, as he has been causing more havoc than he had intended. Tim also explains to Alex that he found a way to block out The Operator’s influence via the pills he had been taking. But Alex ignores it, possibly believing that his way was the only true way to stop The Operator’s memetic spread. "Alex" Kralie is the main antagonist of the ARG horror web series Marble Hornets. A film student that wanted to create his own movie, he eventually devolved into a delusional serial killer after his encounters with The Operator, trying to put a stop to the entity by killing anyone who ever came into contact with it.