ALEX KRALIE	A STUDENT FILMMAKER. WHILE MAKING HIS STUDENT FILM IN 2006 HE GREW PARANOID, CONSTANTLY RECORDING HIMSELF AND BECOMING IRRITABLE. AFTER ABANDONING HIS FILM, HE GAVE THE FOOTAGE TO HIS FRIEND JAY, CUT OFF CONTACT WITH EVERYONE AND MOVED AWAY TO LIVE WITH HIS GIRLFRIEND, AMY, AND THEIR ROOMMATE JESSICA. IT'S LATER REVEALED HE TRIED TO KILL OFF HIS CAST AND CREW AFTER BEING STALKED BY THE OPERATOR AND SPREADING ITS SICKNESS ONTO THEM.
JAY MERRICK	A COLLEGE FRIEND OF ALEX'S, WHO KEPT THE RAW FOOTAGE FOR ALEX'S STUDENT FILM AFTER HE MOVED AWAY. AFTER READING A POST ON SOMETHINGAWFUL THAT REMINDED HIM OF THE TAPES, HE BEGAN LOOKING THROUGH THEM AND UPLOADING THEM TO YOUTUBE. HE LATER DECIDES TO FIND OUT WHAT HAPPENED TO ALEX, BUT HE FINDS HIMSELF BEING AFFECTED WITH THE SAME SICKNESS AS HIM, AND REAWAKENING IT IN EVERYONE ELSE.
TIM WRIGHT	ONE OF THE ACTORS ON ALEX KRALIE'S MARBLE HORNETS, WHO WAS ALSO BEHIND ITS FILM SCORE. HE MET UP WITH JAY EARLY ON IN THE CHANNEL'S HISTORY FOR AN INTERVIEW, AND YEARS LATER, TEAMS UP WITH JAY IN HIS INVESTIGATION. HE'S SNARKY BUT LEVEL-HEADED. HE HAS A HISTORY OF SICKNESS, WHICH STEMS FROM HIS CHILDHOOD.
JESSICA LOCKE	FIRST APPEARING IN SEASON 2, JESSICA WAS ALEX AND AMY'S ROOMMATE. SHE STAYED IN A HOTEL ROOM NEXT TO JAY'S WITH NO MEMORY OF HOW SHE GOT THERE. SHE WAS NOT INVOLVED AT ALL IN THE PRODUCTION OF ALEX KRALIE'S MARBLE HORNETS. SHE GOES MISSING SHORTLY AFTER SHE AND JAY TRY TO PIECE TOGETHER WHAT'S HAPPENING TO THEM, WHICH MOTIVATES JAY TO LOOK FOR HER.
BRIAN THOMAS	THE ACTOR WHO PLAYED THE MAIN CHARACTER ON ALEX KRALIE'S MARBLE HORNETS. HE WAS SHOWN TO BE A CHEERFUL PERSON, BEING THE ONE WHO MOTIVATED TIM TO BREAK OUT OF HIS SHELL AND GET INVOLVED ON THE STUDENT FILM WITH HIM. HE WENT MISSING BEFORE JAY STARTS UPLOADING THE ENTRIES TO YOUTUBE.
MASKED FIGURE	ALSO KNOWN AS MASKY, THEY'RE A PERSON IN A MASK WHO FOLLOWED AND STALKED JAY AFTER HE STARTED POSTING TO YOUTUBE. THEY APPEAR PROMINENTLY IN TOTHEARK'S EARLY VIDEOS, AS WELL AS IN "ENTRY ######". AFTER BEING UNMASKED AND HAVING THEIR LEG BROKEN BY ALEX, HE AND JAY DISCOVER THE MASKED FIGURE IS TIM. IT'S IMPLIED THEIR EXISTENCE WAS CAUSED BY THE OPERATOR'S INFLUENCE ON HIM.
HOODED FIGURE	ALSO KNOWN AS HOODY, THEY'RE THE BRAINS TO THE MASKED FIGURE'S BRAWN. THEY'RE ALWAYS WEARING A HOODIE AND A BLACK SKI MASK WITH A FROWNY FACE ON IT, AND IS BEHIND THE TOTHEARK CHANNEL. THEIR GOALS AND MOTIVATIONS ARE MOSTLY UNCLEAR, ASIDE FROM WANTING REVENGE ON ALEX. AT THE END OF THE SERIES, AFTER THEIR DEATH, THEIR IDENTITY IS REVEALED TO BE BRIAN.
AMY WALTERS	ALEX'S GIRLFRIEND. ALEX MOVED IN WITH HER AND THEY LIVED PEACEFULLY UNTIL 2010, WHEN SHE FINDS ALEX'S OLD CAMERA AND UNKNOWINGLY REAWAKENS THE OPERATOR. AFTER ESCAPING WITH ALEX, SHE GOES MISSING, AND ALEX ENLISTS JAY TO HELP FIND HER.
SARAH REID	A STUDENT ACTRESS, WHO PLAYED THE ROLE OF THE LOVE INTEREST ON ALEX KRALIE'S MARBLE HORNETS, AS WELL AS DOING SOME CAMERA WORK. SHE DISAPPEARS BEFORE JAY STARTS UPLOADING THE TAPES, BUT IT'S SAFE TO SAY SHE'S DEAD.
SETH WILSON	THE CAMERAMAN ON ALEX KRALIE'S MARBLE HORNETS. AN EASY-GOING GUY WHO WAS OFTEN ON THE RECEIVING END OF ALEX'S HOSTILITY DURING THE SHOOTING OF THE FILM. HE WAS LURED INTO AN ABANDONED BUILDING BY ALEX TO BE TAKEN BY THE OPERATOR.