• Psychopathic, narcissistic, cold-blooded, and arrogant. • Behavior: He acts like an indifferent, rebellious teenage "emo" who cares nothing for rules and views himself as superior. He finds most of his peers either annoying or bizarre and is notoriously detached

• Traits: Obsessive, unstable, fanatical, and unhinged. • Behavior: Originally a devoted fan-turned-murderer, she mirrors Jeff's violent tendencies out of a warped, obsessive fixation on him and her own traumatic descent into killing.

• Traits: Wrathful, determined, snarky, and vengeful. • Behavior: Unlike indiscriminate killers, she acts as a vigilante or hunter whose primary, consuming goal is to make Jeff pay for murdering her family. She is sharp-minded, disciplined, and fiercely protective of innocent people.

• Traits: Sadistic, deceptive, psychopathic, and deeply cruel. • Behavior: He acts like a cheerful, energetic, and colorful clown to gain the trust of lonely children. Once he has isolated them, his true, pitch-black personality emerges, and he uses dark magic and torture to violently break both his victims and their parents for his own amusement.

• Traits: Childish, playful, bratty, and attention-seeking. • Behavior: As a young ghost, she acts like a mischievous trickster who loves scaring adults or pranking people. She is deeply protective of children and innocent people, though she can throw destructive, jealous temper tantrums if she feels ignored

• Traits: Observational, calculated, reclusive, and resentful. • Behavior: In his original Marble Hornets depiction, he operates almost entirely from the shadows, using cameras and stealth to stalk and manipulate events. He is highly pragmatic and willing to use extreme, aggressive tactics to achieve his goals, driven by a deep anger toward the supernatural forces ruining his life.

• Traits: Exhausted, cynical, protective, and mentally fractured. • Behavior: In his original Marble Hornets canon, Tim is a deeply traumatized individual who suffers from severe memory blackouts and coughing fits. When his alternate persona, Masky, takes over, he becomes a quiet, tactical, and aggressive force driven by a desperate compulsion to survive and destroy the Operator (Slender Man), often acting hostile toward those who try to interfere.

• Traits: Fragmented, volatile, protective, and vengeful. • Behavior: He suffers from a split personality. Liu himself is generally sweet, sorrowful, and emotionally open (often visiting his family's graves), whereas his aggressive protector alter, Sully, harbors a vicious hatred for Jeff and acts spitefully or hostile toward outsiders.

• Traits: Cryptic, quiet, lazy, and hyper-fixated. • Behavior: He moves with silent, stealthy precision to harvest human organs. Despite his monstrous appetite, he is generally patient, keeps to himself, and possesses a dark sense of humor, though he is easily hurt or offended by negative judgments

• Traits: Hyperactive, sarcastic, emotionally detached, and unpredictable. • Behavior: Afflicted with bipolar disorder, Tourette's tics, and CIPA (an inability to feel pain), he suffers from constant hallucinations and migraines. Externally, he acts erratic, clingy toward friends, and bubbly in a unhinged way while blindly obeying Slender Man as a father figure