The supernatural •
Mort Graves – An inept loser teenager who was beheaded by a train in a racing accident. It seems that before his death, he already had a pathetic life. After his death, his life is actually much worse with his family being totally indifferent to his situation. He has a crush on Kimberly and is oblivious to Maureen's clear feelings for him. As a ghost, he has the ability to detach his head, float around, and become invisible and otherwise intangible to living people. He also has the ability to affect electronic equipment using a technique he named "ectoplasmic shock". Mort can also look into daydreams of others and interact with film as if he were in a movie, and create objects or props alongside multiple apparitions of himself in the event of a haunting. •
Teen Death – The son of Death who takes in dumb teens who died in ridiculous predicaments. He loves his job and apparently likes to torment Mort. Despite this, he has admitted that he does care for him to some degree. Teen Death acts as a tour guide/employer for Mort in the Netherworld, where many bizarre subdivisions exist for different deaths. He shows a particular interest in
trains and video games, alongside trying to get Mort to haunt his family.
Mort's family •
Bruce Graves – Mort's father who seems more concerned with the state of his Studebaker than the loss of his son. •
Wendy Graves – Mort's mother who is upset about how things have been going for the family. Is the most caring of Mort's family post-death, though is still bitter that Mort left so soon. •
Kyle Graves – Mort's younger brother who is an expert in finances and wants his brother's room. Known blackmailer amongst his family. •
Cyndi Graves – Mort's older sister who uses Mort's death as a way to pick up boys. Before the events of the comic, it's implied that Cyndi's fashion taste was much more reserved and modest, but after Mort's death, she's taken on a more bombastic style. •
Digby "Grandpa" Graves – Mort's crotchety grandfather. Lives at a nursing home and doesn't get out much. Likes fast food and
Wheel of Fortune.
Living teens •
Kimberly Dimenmein – A beautiful brunette teen who is admired by Mort. She is into poetry and singing, and though despite showing no interest in the titular loser prior to his death, openly showed sadness for him and dedicated several poems to him and his demise. It's never made clear her true feelings for Mort despite her creative output, though she does participate in Positive Feedback while not being familiar with his friends. Is Lance's on-and-off girlfriend, until she leaves him to run away from home in the hopes of becoming a performance artist. She assumes lead vocals and songwriting for Positive Feedback after her audition in the second issue. •
Maureen Redding – A tough biker girl who showed an interest in Mort while being a platonic friend. After his death, she was noticeably distraught, and accused Kimberly of latching onto a tragedy for attention (Mort interprets this as bullying, and as such, harbors a misunderstood resentment towards her). Maureen was a childhood guitar prodigy, and though she dislikes Kimberly, she was nevertheless willing to play alongside her when she joined Slick and Weirdo's band. Maureen mentions that the
Harley-Davidson motorcycle she rides is her dispatched brother's, who was currently serving at
Guantanamo Bay during the events of the comic. Maureen later sells the bike once she begins dating Lance in Kimberly's absence, apparently unbeknownst to her brother. •
Lance Boyle – Kimberly's handsome jock boyfriend. Initiates the race that lead to Mort's death, but inadvertently comes to his funeral because of Kimberly's objections. He later leaves Kimberly after she runs away from home and decides to hook up with Maureen. •
George "Slick" Slikowski – One of Mort's friends. He is a tall lanky boy with long hair. Slick seems to have a womanizing personality, but after Mort's death, he grows a strong fascination with Kimberly, which the latter is particularly afflicted by. His parents are
science fiction fans. Plays the bass in Positive Feedback. •
Reardon "Weirdo" Weedlow – One of Mort's friends. He is a short stout boy with a half shaved head and sunglasses. More cooler and reserved than Slick, Weirdo is the voice of reason amongst Mort's friends, typically playing
straight man to Slick's
comic. His parents are doting and extremely well-meaning to the point of destruction. Plays the drums in Positive Feedback. •
The Kallikaks – Off-handedly mentioned siblings in a well-disliked family, consisting of brothers and a sister. Their name is derived from
The Kallikak Family, a 1912 book promoting the theory of eugenics. According to Kyle, who holds a photo of the event as blackmail, Mort had stuck his tongue in the ear of sister Roxie, the only named member of the family.
Other adults •
The Weedlows – Weirdo's parents. His father had dreams of being in a band as a teenager, and finances his son's musical endeavor through questionably-sourced loans. Because of Positive Feedback's failed performance, the family are unable to pay back their dues, and are evicted from their home. •
Mr. Weisenheimer – Mort's homeroom teacher. Doesn't like his students, and they don't much care for him in return. Is presumed to have been teaching for a long amount of time, with his age a common insult. •
Dr. Caligari – School psychologist. Her name is derived from the 1920 German horror film
The Cabinet of Dr. Caligari. Uses a hearing aid, and is taken advantage of by Mort's homeroom to get out of classwork. Is the first victim of Mort's "ectoplasmic shock". •
Bombs and Hoses – A destructive rock band that plays ABCD's before Positive Feedback. They are a parody of
Guns N' Roses, with each member resembling the then-current 1990–1993 lineup. Generally disrespectful to their follow-ups, referring to them as "Positive Feedbags" and destroying their equipment. ==Proposed adaptations==