- "So, at last we meet in my domain. Rather brave, aren't you? I must admit, I never thought you'd get this far. But no matter. It's just a shame you missed that fateful day when all of your classmates turned to monsters. Now it's your turn, but not until I have some fun with you first. Out, I say, out!"
The apparent ruler of Haunted Island, an evil and troublesome witch. She has turned your classmates into monsters and imprisoned them in the attic of her house.
- Big Bad: The cause of all the children turning into monsters; you find that she causes problems for other people on the island too, like the frog prince and even Flap.
- Karma Houdini: After you set your classmates free, she flees her house and promises to meet you again.
- Random Event: She occasionally appears to you at random after you beat a mini-game, albeit unlike Repsac she only taunts you.
- Wicked Witch: And a stereotypical one, to boot, only missing a black cat.
- "Select the correct answer if you wish to pass."
An evil ghost who serves as the keeper of the island and as Ms. Grunkle's right-hand-ghost.
- The Dragon: To Ms. Grunkle.
- The Dreaded: Both in the game and out of it; most players are more afraid of him than they are of Ms. Grunkle, and for good reason.
- Random Event: Every now and then, he randomly appears and asks you an educational question. If you get too many of his questions wrong, you'll be sent to the Labyrinth. Oh, and he can catch you in there too.
- Sdrawkcab Name: His name is "Casper" spelled backwards.
- "Well hello... what a nice specimen you'll make, *laughs* Oh, I didn't recognize you! You're one of the kids, aren't you?"
A giant purple bat who talks like Peter Lorre and serves as your guide through all the minigames on the island. Apparently considers himself to be everyone's best friend, although it's never explained why he was looking for a "specimen" initially...
- Baleful Polymorph: The old Knowledge Adventure website gives him a more fleshed out backstory, claiming he was once a child turned into a bat by Ms. Grunkle. This is likely the reason he's so sympathetic to your case.
- Exposition Fairy: He explains all of the mini-games and your overall objectives, and can be summoned for tips at any time.
- Freudian Slip: When you first meet, he tells you happy "haunting" before quickly correcting himself and saying "hunting."
- No Celebrities Were Harmed: As described above, Flap's voice sounds like Peter Lorre.
- "Oh, I'm so glad you've come. I've been expecting you. The children certainly need your help."
A Fortune Teller who assigns you your missions.
- Big Good: Judging by how Ms. Grunkle is able to immediately guess she's responsible for you having her wand, the fortune-teller apparently makes it a habit to stop the wicked witch when possible.
- Fortune Teller: And a stereotypical one, to boot, complete with an accent, caravan, and crystal ball.
- Mission Control: Pretty much her role in the game. You contact her with a Crystal Ball in place of a telephone.
- Nightmare Fetishist: She finds bugs to be cute, and Flap himself says her sense of humor is rotten.
- Punny Name: "Pomreeda," i.e. "palm-reader".
- Tarot Motifs: You missions are printed on tarot cards.
- Baleful Polymorph: All turned into monsters.
- Helpless Good Side: The poems Madame Pomreeda recites imply that the monster forms are evil alter-egos of the children, and that magic is required to allow their good side to resurface.
Musical prodigy turned into a werewolf; he's the first child you have to restore.
- Child Prodigy: A musical prodigy, and a sweet looking little kid.
- Meaningful Name: "Wolfgang," which refers not only to his being a wolf but is also a reference to Wolfgang Amadeus Mozart.
- Our Werewolves Are Different: He's a wolf constantly, and one that stands upright and snarls.
Artist girl turned into a Medusa.
- Child Prodigy: If the framed portraits she possesses are hers, she's got quite a talent for a fourth-grader.
- Meaningful Name: "Violet," in other words a color, given she's an artist.
- Medusa: The monster she's become.
Math genius turned into a brain creature.
- Brain Monster: A monster with a brain for a head.
- Good with Numbers: As indicated by his possessions.
- Meaningful Name: "Albert" is likely a reference to Albert Einstein, while "Brayne" is a pun on "Brain."
- Punny Name: "Brayne" being a homophone for "brain."
- Smart People Wear Glasses: One of the indications he's smart to Madame Pomreeda is that he possesses a pair of glasses.
Beauty queen turned into a warthog.
- Beauty Contest: She's the queen.
- Beauty Equals Goodness: Her beauty on the outside is intended as a reflection of her inner beauty, according to Pomreeda's verse.
- Beauty to Beast: The theme in her case, turned into a warty creature when she was once beautiful.
School Clown turned into a monstrous Clown.
- Class Clown: Literally, as most of his possessions are clown clothes.
- Evil Laugh: When clicked, he gives one.
- Monster Clown: The monster he was turned into.
Class jock turned into a gorilla.
- Big Man on Campus: His archetype, although he attends a tiny schoolhouse.
- Extreme Omnivore: When clicked, he eats a football.
- Jerk Jock: The personality of his gorilla self, but the actual kid is apparently an aversion.
- Killer Gorilla: The monster he was turned into.
- Alpha Bitch: The vampire head is apparently this, being a cruel leader as opposed to a kind and responsible one.
- Irony: As a class president, Laura is a politician of sorts. With two heads, she becomes a "two-faced" politician.
- Just Eat Him: Her transformation back to being a normal girl is her normal head turning around and swallowing the vampire one.
- Multiple Head Case: Unlike the other students, none of her features changed; she just gained an extra head.
- Status Cell Phone: One of her missing items.
Class dunce turned into Frankenstein's Monster.
- The Ditz: He gets all F's and has a dunce cap as one of his possessions.
- Dunce Cap: One of his missing items.
- Frankenstein's Monster: The monster he was turned into.
- Scary Stitches: Part of his design as a monster.
Science whiz kid turned into a science experiment.
- High-Pressure Emotion: She has smoke coming out of her ears.
- Jekyll & Hyde: The monster she was turned into is a horrible woman named "Miss Hyde," as well as the original child being a scientist herself, making her into this archetype.
- Smart People Wear Glasses: She's another brainy student and naturally wears glasses as a regular human.
Girl turned into a monster toy.
- Creepy Doll: What she turns into.
- Security Blanket: Seeing as Jane is characterized as being shy, her teddy bear is likely meant to be this for her.
- Shrinking Violet: The original child is noted to be shy by Madame Pomreeda.
Butler kid turned into a monstrous penguin.
- Everything's Better with Penguins: Although in this case, the penguin is an evil one.
- Toothy Bird: A penguin with sharp teeth.
Mechanic girl turned into a tire-headed monster.
- Girlish Pigtails: She sports some despite her traditionally masculine interests.
- Wrench Wench: Her original personality as an aspiring car mechanic.
Medical prodigy turned into an anthropomorphic hypodermic needle.
- Punny Name: Her name is a pun on "penicillin."