Jaclyn DeForest
The main protagonist who moves from Chicago to the small village of Sherpia with her aunt.
- Agent Scully: At first, when her new friends in Sherpia tell her about the Snowman that lives at the top to the hill in their village, she is highly incredulous. But soon, curiosity gets the better of her, and she goes to the hill to find out.
- Brainy Brunette: She has dark brown hair, and is shown to have a distinctive memory. She remembers the first verse of a poem that was read to her by her mother years ago, and near the end, she quickly memorized the second verse of the poem just by glancing at it, right before her aunt snatched the poem book away and shreds it to pieces.
- City Mouse: She grew up most of her life in Chicago, so she's understandably not suited at first to a village. Especially one that is so steep and mysterious.
- Curiosity Killed the Cast: Her fascination for finding out the mystery of the snowman and why she is here in Sherpia leads to her and her aunt nearly dying if it wasn't for her father arriving just in time to save them.
- Earn Your Happy Ending: At the end of the book, Jaclyn is reunited with her father who she hasn't seen in years after they defeat the evil snowman that had been a burden all those years ago.
- Fatal Flaw: Her curiosity, which has even almost cost her her life.
- Fish out of Water: She is really out of her element when first arriving to this town, used to being at a large school instead of a small one, used to having lots of friends instead of very few, and used to having heavy traffic instead of mostly bare roads.
- Horrible Judge of Character: Played with. She starts to side with and believe the claim of a dangerous living snowman that he might be her father, but this is only because she was disillusioned with her aunt who kept secrets from her throughout the book.
- I See Dead People: She thinks that she can hear a ghost talking to her one night when she's in bed, telling her not to go out and stay away from the Snowman's cave. She's wrong about that; she realizes later on that this was just her aunt pretending to be a spirit to scare her into not approaching the Snowman.
- Innocently Insensitive: Once Rolonda explains the backstory of the snowman to her, Jaclyn's response is to laugh at the story. Not out of pure spite, but because she thinks it's all ludicrous. She does start to wise up a bit later on though.
- Missing Mom: Jaclyn mentions that her mother died when she was five years old.
- Naïve Newcomer: She is quite baffled when she first arrived at Sherpia, wondering how come everyone builds weird looking snowmen, why people don't want her to go up a tall hill, and why people are afraid of Conrad who lives at the foot of the hill.
- Nice Girl: She is usually respectful to her aunt and to her new friends in Sherpia. However, that doesn't stop her from being annoyed at the former for not giving her enough answers of what's going on around her.
- Well-Intentioned Extremist: After being left in the dark throughout most of the story of why she was here and why there was so much mystery in Sherpia, she decides to go up the hill to the Snowman's lair to get some answers. And when her aunt pleads with her not to say the verse that would melt the Snowman to reveal its true form, Jaclyn does it anyway because she wants to see the truth.
Conrad DeForest
A mysterious stranger who lives with his wolfdog by the base of the hill where the Snowman lives.
- Adaptational Jerkass: While he still helps save the day in Goosebumps HorrorTown, he is more of a grumpy jerk about it.
- Big Damn Heroes: Just when Jaclyn and her aunt were in danger of being thrown off the ledge of a tall hill by the melted Snowman, Conrad enters with a whole enchanted army of snowmen to rescue them and trap the snowman back in ice.
- Daddy Had a Good Reason for Abandoning You: In the last chapter, he reveals to Jaclyn that he stayed behind in Sherpia instead of raising Jaclyn herself because he felt like a burden for endangering the village by creating the snowman in the first place.
- Evil Sorceror: He was part of the reason why the monster was created in the first place, and he then uses his powers to bring to life a line of snowman that were built all along the village in order to contain this original snowman.
- Good All Along: Is feared by the entire town for being mysterious and appearing to be menacing. However, he is actually just looking out for the village to protect it from the monster he created in the first place.
- Icy Blue Eyes: Has light gray marble-like eyes, and they seem to creep Jaclyn out at first given the way they stare at her when she first sees him.
- Mighty Lumberjack: This is his normal job.
- My God, What Have I Done?: He is shocked with what he created, and tries to undo the damage.
- Papa Wolf: He saves Jaclyn from being killed by the snowman. Granted, this happened BEFORE he realized that she was his daughter, but still.
- Something Only They Would Say: When he says "Beware the Snowman", a phrase that Jaclyn remembers from a poem that her mother read to her, she is instantly curious and wants to learn more.
- Tears of Joy: When Jaclyn's aunt reveals to her and him that she is Conrad's daughter, he cries happily as he realizes that he is reuniting with her after so many years.
- Walking Spoiler: His background and his connections are all tied to the big twist at the end of the book.
The Snowman
A monster accidentally created by two sorcerers who could only trap it in the guise of a snowman. The Snowman terrorizes the mountain village of Sherpia but is held back in an ice cave by the power of a man named Conrad.
- And I Must Scream: Conrad enchants the snowmen in the village to come alive, attack the demon, and them somehow manage to freeze it in the walls of the ice cave.
- Big Bad: Of Beware, The Snowman.
- Flat Character: His characterization is sparse even by Goosebumps villain standards. He isn't shown to be a power-hungry control freak like Slappy and King Jellyjam, he doesn't follow some alien set of values like the Creeps or the Beasts, and he doesn't even seem to be driven by instinct like The Haunted Mask or The Blob That Ate Everyone. He's just evil because he's a monster, and that's what monsters are.
- Generic Doomsday Villain: Despite being clever enough to trick Jaclyn into freeing it, it doesn't have much character or motive at all beyond being a giant evil beast that terrorizes the village.
- Gone Horribly Wrong: It was created by accident thanks to the reckless spell casting of a pair of sorcerers.
- Luke, I Am Your Father: It tries to convince Jaclyn that he is really her father, trapped in the snowman form by accident thanks to her mother and aunt. Unfortunately, because Jaclyn had begun to distrust her aunt ever since they moved to Sherpia, she believes the snowman and frees him.
- Manipulative Bastard: It plays off the distrust Jaclyn has developed with her stern Aunt Greta and gets her to seriously consider that it might be her Disappeared Dad. When she does free it, the Snowman decides to get rid of her.
- One-Winged Angel: The Snowman's current appearance is not its true form. After Jaclyn is tricked into freeing it, we find out its true form is like that of a Minotaur with red, crusty scales.
- Snowlems: Version III.
- Ungrateful Bastard: It still tries to kill Jaclyn even after she frees it.
- Was Once a Man: It claims to be Jaclyn's father. It's not.
- You Have Outlived Your Usefulness: It "thanks" Jaclyn for freeing it by trying to kill her.
