List of Gravesville Intermediate characters

Main

 * Abraham Stoker-Lugosi (voiced by Jacob Hopkins), an 110-year-old, but now 140-year-old vampire who likes to suck blood and is afraid of the sun and only carries an umbrella. In "Abraham's Allergies", it is revelead that he is allergic to the sun and garlic. He can't die because he is immortal and undead. In "Eye Got My Eye On You", he develops a crush on Eyereena.
 * Gregory Talbot (voiced by Phil LaMarr) is a werewolf who likes to eat meat and acts like a dog. In "Humans Are Allowed", he fears that humans would put "silver chainy thingies" on him, his family and all werewolves.
 * Annie Boleyn (voiced by Erin Fitzgerald) is a 6th through 8th grade (Around season 3) ghost girl who is very friendly. She has a ghostly tail instead of legs and is obsessed with the show "Danny Phantom". She counts as "cute" because... why not? She is transparent, walks through walls, and haunts her house she died in, especially her own school, which she used to live in a boarding school before she died. She wears braces and in monochrome shades of white. She is shy and sweet, but cracks terrible ghost jokes and puns. She cannot die because she is an undead creature and a immortal. In "Just Ghost To Show You!", she had a poltergeist cousin named Portia Gysst.

Recurring

 * Franklin Stein (voiced by Billy West) is a Frankenstein's monster who sometimes likes to hang out with Cleo Patrica. He hates fire and seems to have a crush on Gregory.
 * Cleo Patrica Mum-Ra (voiced by Madisyn Shipman) is a mummy who likes to play on her phone. She is super bossy, bratty, and is called a "Egyptian princess" by Franklin.
 * Bella Lugosi (voiced by Breanna Yde) is the vampire cousin of Abraham. She is a perky goth who wears goth Lolita clothes. She also seems to have a crush on Annie.
 * Meddy Dusa (voiced by Francesca Capaldi) is a Gorgon girl who is ditzy and sweet. She wears a newsboy cap to cover snakes in her hair and wears sunglasses in order to not turn people into stone. She somehow gets clumsy when she trips and falls down, she lacks her sunglasses and her eyes turn red, turning someone, however, into stone. She has two sisters named Sally Theno and Erri Yale. Her name is a pun of Medusa while her sisters' names are puns of Stheno and Euryale.
 * Goolia Bloberts (voiced by Grace Kaufman) is a cute blob girl. She is a humanoid who is gooey on the inside and out. She is a nerdy girl who left goo all over the place, resembling ectoplasm. Her skin color is green.
 * "Headless" Hailey Horsemann (voiced by Kate Higgins) is a headless horsewoman ghost who sometimes loses her head. She is friends with Annie Boleyn. She is the head secretary and assistant principal. In "Heads Will Roll", she hates all things "cute and cuddly".
 * Mortia Cadaver (voiced by Grey DeLisle) is a zombie who is very smart. She is different like the rest and eats brains. She likes fashion and taming math classes with Annie
 * Headmistress Spella Sorcerson (voiced by Estelle), a bossy witch headmistress of the school. She seems to work as a principal and suspends people.

Minor

 * Portia Gysst (voiced by Cristina Pucelli) is a poltergeist prankster who is Annie's cousin. She often sometimes is good friends with Annie, Phantasmagoria, Kao, Hailey and Bannah. She has light blue skin, blue eyes, blue hair in pigtails, a blue dress, and a ghostly tail (like Annie and Kao) surrounded by blue aura. She glows blue vapors unlike the different color of Annie's ghostly white vapors.
 * Nessica MacLochs (voiced by Karen Gillan) is a Down Syndrome Loch Ness Monster. She likes playing with bagpipes and is friends with Bannah. She is from Scotland.
 * Bannah Shee (voiced by Michelle Fairley) is a Banshee with Autism. She doesn't talk to people, shakes her hands when nervous, makes a loud screaming noise when angry, and covers her ears when she hears a loud noise. She is from Ireland.
 * Gill Webbs (voiced by Grant Palmer) is a Gillman who loves surfing. He takes swimming classes.
 * Henrietta Jekyll/Edwina Hyde (voiced by Kristen Schaal) is a bipolar girl with a "Jekyll" side that causes her to become normal while her "Hyde" side is her evil side. When she goes insane too much and refuses to calm down, she turns into Edwina.
 * Eyereena Pupill (voiced by TBA) is a Gothic cyclops girl whom Abraham develops a crush on.
 * Meowbelle Hiss (voiced by Jenny Slate) is a werecat who hates humans.
 * Iris Pupil (voiced by Tara Strong) is the stepsister of Eyereena and is a triclops, a monster with three eyes.
 * Oscar O. Gurr (voiced by Noah Schnapp) is an ogre boy in the school.
 * Kao Nashi (voiced by Dante Basco) is a faceless ghost boy who is of Japanese descent. He had an invisible face because he is a Noppera-bō. His species is based on the Noppera-bō, a faceless ghost in Japanese culture.
 * Ian Visible (voiced by Zach Callison) is an invisible boy who isn't even a ghost. He had invisible skin and hair, but he wears clothes and glasses to show himself.
 * Bonita Bonezalez (voiced by Alexa Vega) is a Hispanic skeleton who is a homage of Skelton Calaveras from Monster High.
 * Casterine Spellcraft (voiced by Nika Futterman) is a witch student who is enrolled to this school. She is an Alpha student along with her clique, Mortia, Meddy and Cleo Patrica. She somehow bullies Annie for her lack of eating skills due to food phasing through her body via intangibility. Casterine is the stepdaughter of Spella's long-lost 242-year-old aunt Griselda.
 * Phantasmagoria Opera (voiced by Eden Sher) is a perky goth Classical music loving phantom.
 * Layla Naharra (voiced by Chelsea Kane) is a young human girl who fits in a school of monsters. She is able to see ghosts, poltergeists, banshees, phantoms and of course, Noppera-bōs.

Family Members

 * Drusilla Stoker (voiced by Kimberly Brooks) is Abraham's vampire mother.
 * Vladimir Stoker (voiced by Billy West) is Abraham's vampire father.
 * Lauren Talbot (voiced by Madisyn Shipman) is the 14-year-old sister of Gregory.
 * Wilhemina Talbot (voiced by Sadie Sandler) is the 12-year-old sister of Gregory.

Teachers and Staff

 * Mrs. Burgins (voiced by Vanessa Marshall) is a troll Reading and Frighting teacher.
 * Mrs. Shreeque (voiced by TBA) is an Irish-American banshee Social Skills teacher.
 * Mr. Phineas Antom (voiced by John DiMaggio) is a green-skinned phantom Music teacher.
 * Mr. Booman (voiced by Tom Kenny) is a boogeyman Arts and Crafts teacher.
 * Mrs. Flaym (voiced by Lauren Tom) is a Chinese dragon Social Studies teacher.
 * Mr. Alfred A. Bominable (voiced by Maurice LaMarche) is a Yeti Math teacher.
 * Mr. Rott (voiced by H. Jon Benjamin) is the zombie Language Arts teacher.
 * Mrs. Felynn (voiced by Jill Talley) is the werecat Science teacher.
 * Mrs. Hauntsberg (voiced by Candi Milo) is a ghostly liscarian who haunts a Li-scary.