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Characters introduced in the Geronimo Stilton series
Main characters
Geronimo Stilton
Animated version voiced by: Brian Drummond
The editor in chief of The Rodent's Gazette, the most famous daily newspaper on Mouse Island, but his true passion is writing books, which all become bestsellers. He enjoys reading books, listening to classical music, and playing golf; he even collects antique, 18th century cheese rinds, of all things! He adores his work and his family, but he hates to travel, because he gets airsick, seasick and carsick. Nonetheless, he often gets involved by Thea and his relatives and friends in extreme situations and adventures all around the world.- Abled in the Adaptation: He doesn't wear glasses in the animated show.
- Adaptational Badass: In the books, Geronimo was a Cowardly Lion who is constantly scared of many things, but will jump into action when needed. In the TV series, he is more brave and open-minded about going on adventures, though he still tends to be a Nervous Wreck every now and then.
- Berserk Button:
- Mispronouncing Geronimo's name will eventually send him into a rage.
- He's not fond of having his family threatened either, especially Benjamin.
- Beware the Nice Ones: Geronimo is one of the nicest rodents on Mouse Island. However, if anyone thinks that they could get away with hurting his friends and family, he will put his cowardice aside and fight back.
- Black Sheep: Geronimo is mild-mannered and timid, in contrast of his more adventurous and thrill-seeking family, who often has to tell him to stop being such a killjoy every now and then.
- Butt-Monkey: If something can go wrong for someone, it will go wrong and for him.
- The Chew Toy: The universe seems to have it out for him; anything that can be unpleasant to experience will happen to Geronimo.
- Cowardly Lion: Is terrified of a long list of things, but when push comes to shove, Geronimo will swallow his fear and make sure that the day is saved.
- The Drag-Along: He hates to travel, and often resists being sent far afield, for all the good it does him.
- Foil: To Thea, his sporty, adventurous younger sister.
- The Glasses Gotta Go: Meta-example; he wears glasses in the books, but his animated counterpart does not have them.
- The Hero: Not only is he the main character, but he's always willing to do the right thing when confronted by someone in need.
- Honorary Uncle: Pandora/Bugsy Wugsy sees him as this, constantly calling him "Uncle G". Geronimo verbally denies this, but is still fairly avuncular towards her (especially in the animated series).
- The Klutz: Extremely prone to tripping or otherwise experiencing painful spills and accidents.
- Meaningful Name: His family's surname plays on mice's purported love for cheese.
- The Name Is Bond, James Bond: Geronimo introduces himself this way at least once per book. One book is even titled My Name is Stilton, Geronimo Stilton.
- Only Sane Man: Geronimo often comes across as this, both as a foil to Trap's Cloud Cuckoolander tendencies and as a point from which the comedy is milked for all it's worth.
- Papa Wolf: Do not, under any circumstances, hurt Benjamin, Pinky or Pandora (or come to think of it, any child); it won't end well for you.
- Prone to Tears: Due to his sensitive nature mixed with the insane adventures he's essentially dragged into, Geronimo tends to break down in tears a lot. Especially in the Kingdom of Fantasy series, where he cries at least once per book.
- The Scapegoat: Geronimo tends to get the blame for whatever disaster occurs at the hands of Trap's antics, despite usually being the victim. Averted in the animated series, as Trap is always called out for his antics, though while Geronimo is framed in the cartoon, it's usually for more serious consequences by rivals or outright criminals.
- Sharp-Dressed Man: He is almost always seen wearing his green suit.
- Weirdness Magnet: Geronimo gets into strange and bizarre situations no matter where he goes, and staying at home doesn't keep him safe from it either.
Thea Stilton
Animated version voiced by: Sarah Edmondson
Geronimo's younger sister, a rodent with a professionally successful career, and unrepentant heart-breaker in her private life. A skilled photographer continuously in search of her latest scoop, Thea is ready to leave to exciting adventure at the mere drop of a word, and punctually returns with sensational articles and photos. She rides a motorcycle, flies a plane, loves racing cars, is a certified parachute jumper, holds a black belt in karate, and teaches survival courses. Thea can also be frivolous and teasingly spiteful, and loves the latest fashions. She has her own series about her friends at Mouseford Academy. She is a special correspondent for The Rodent's Gazette.- The Ace: Good at pretty much anything she tries her paws at, much to Geronimo's mixed admiration, jealousy and chagrin.
- Action Girl: Unfortunately, she's always the first to suffer The Worf Effect, though not to the extent of being rendered into fauxhood.
- Big Sister Instinct: Age-inverted since she's the younger of the two. However, while she may tease Geronimo a lot, she will wipe the floor with you if you prove a danger to him.
- Breakout Character: Boasts an entire spin-off series to her name.
- Cool Teacher: Serves as one to the Thea Sisters in her spin-off series.
- Dude Magnet: In the animated series; if there's a guy who can fall for her, he will. Thea's reaction to this varies from pleasure to disgust. This is also somewhat the case in the books, as Bruce Hyena and Hercule Poirat, friends of Geronimo's in the books, both have noticeable crushes on her.
- Foil: To Geronimo, her quiet, cautious older brother who prefers more intellectual pursuits.
- Kick Chick: She uses a lot of kicks in her fight scenes.
- The Lancer: Serves as Geronimo's foil and tends to prod him into various adventures.
- Mama Bear: Mostly towards Benjamin and Pandora, but if there is a minor who she's gotten attached to involved in the current adventure, she will defend them to the death.
- Passionate Sports Girl: Thea is extraordinarily athletic and is skilled in many sporty pursuits, including and not limited to motorcycle riding, piloting, car racing, skydiving, karate, and wilderness survival.
- Rapid-Fire Fisticuffs: A kick variation. While saving Trap from a couple of Mooks in one episode, she defeats the last one by kicking him in the stomach, followed by a flurry of kicks to his chest and stomach. Trap can only watch in awe as Thea pummels the giant mook with incredible leg speed until he faints after the last kick.
- Screw the Rules, I'm Beautiful!: She often uses her feminine wiles in this manner, but she doesn't get to do this in the Animated Adaptation, where she's portrayed as a more tomboyish mouse. Her animated counterpart even hates fashion and anything that has to do with making girls look pretty, judging from the episode "Top Model Thea".
- The Smurfette Principle: She started as the only main female character, though the cast has expanded to include other female mice like Pandora.
- Tomboy and Girly Girl: The spirited, hot-headed Tomboy to Pandora's sweet, amicable Girly Girl.
- Worf Effect: She is easily the best fighter of the main characters. This is why every time that she's restrained, it's often to add more drama to the episodes.
Trap Stilton
Animated version voiced by: Richard Ian Cox
Geronimo's annoying cousin. He is always eating all of Geronimo's food, hence his largely rounded appearance. Trap is called obnoxious in most of the Geronimo Stilton books but appears as a very interesting character. Trap believes that he is a good cook, but Geronimo thinks otherwise. Trap is loud and obnoxious, and he always wants money. He lets Geronimo do all the work. Trap always does pranks on Geronimo, and is always signing Geronimo up for things that he does not like to do. He also has friends all over New Mouse City. He owns a shop called Cheap Junk for Less.- Adaptational Intelligence: Inverted. The cartoon regularly portrays Trap as far more simple-minded and foolish than his book counterpart, on top of upping his manchild antics.
- Big Eater: Not only does he routinely eat all of Geronimo's food but he spends a large portion of any given story either eating or thinking/talking about food.
- The Big Guy: Fills this role as, while he's not athletic, his large size proves useful for getting rid of stubborn obstacles.
- Butt-Monkey: Especially in the Animated Adaptation.
- Cloud Cuckoolander: Has an… interesting way of viewing the world around him.
- The Ditz: In the books, Trap is an inconvenience or annoyance for Geronimo at best, but the animated series wildly exaggerates it to the point that Benjamin and Bugsy are more competent than him.
- The Friend That Nobody Likes: As much as his relatives care for him, Trap's negative qualities tend to overwhelmingly dominate his actions, which means that the rest of the Stiltons and their associates are often at their wits' end and have shortened fuses when it comes to his antics. This is downplayed in the books, but in the animated series, Trap is always struck with Laser-Guided Karma, and his family regularly tells him off for his foolhardy and selfish behavior.
- Innocently Insensitive: Whenever Geronimo is having a problem, Trap will always say something that reminds him of the problem and makes him feel worse. However, Trap isn't being malicious; he either doesn't realize the effect of his words, or he thinks he's helping.
- Jerk with a Heart of Gold: Combines with Innocently Insensitive. Trap genuinely cares about his cousin Geronimo as well as Thea, Benjamin and Pandora, and the others too, but often comes off more as a douchebag to the more straight-laced Geronimo.
- Karma Houdini: If Trap's antics cause any disasters, the blame will usually fall onto Geronimo. Averted in the animated series, where he gets called out for his foolishness regularly.
- Large Ham: And how. Many of his appearances in books involve him shouting and slamming doors open, among other things.
- Manchild: Trap is quite childish, despite being an adult.
- Never My Fault: Both the cartoon and book versions of Trap will rarely take responsibility for any disasters of their creation, with the only difference being that the cartoon iterations of the cast have far less patience for his antics.
- Too Dumb to Live: Trap's antics in the animated series often endanger himself and the rest of the Stiltons.
Benjamin Stilton
Animated version voiced by: Erin Mathews
Geronimo's favorite, 9-year-old (12 in the animated series) nephew. Benjamin is a sweet, polite boy. His teacher at school is Miss Angel Paws, and his best friends are Sakura and Oliver (in the animated series, they're replaced by Pandora, though Benjamin seems to get along with all his classmates). He has a great curiosity and is surprisingly enterprising. He is always very busy jotting notes on his notepad during other adventures. His dream is to work alongside with his uncle as a successful journalist in the future. Benjamin is Geronimo's favorite rodent and is a needed character in the books. Whenever Geronimo doesn't agree about anything, only Benjamin's pleading look is needed to make him agree.- Adaptational Personality Change: The books show that he's a sweet, innocent, and kind mouse. In the animated series, while still a good kid, Benjamin is more impulsive, tech-savvy, and dynamic. He also became a little impatient, as he often jumps into action without thinking about the dangers first. The only thing that has stayed the same in both adaptions is that he's a Child Prodigy who has helped the adults whenever they are in a tough situation.
- Adorably Precocious Child: Despite being a grade school student and short of being on the actual payroll, Benjamin is treated almost like a part of The Rodent's Gazette's staff due to his expertise and considerably mature personality, but not to the extent of coming across as a miniature adult.
- Age Lift: Benjamin was 9 years old and in elementary school in the books. However, in the TV series, he was 12 and in middle school.
- Child Prodigy: He is undeniably smart for his age.
- Cuddle Bug: His general reaction to reuniting with Geronimo after a separation is to give his uncle a hug.
- Nephewism: The main reason he's able to be part of the plot is because he's the main character's nephew. Unusually for this trope, Benjamin's mother has seen no mention in anything, not even in the manual for the series despite the tons of Stilton relatives mentioned over the course of the books.
- Playful Hacker: In the animated series, Benjamin can literally hack just about anything with minimal effort.
- Puppy-Dog Eyes: Is extremely good at these, being able to make Geronimo give in to almost anything once he turns them on.
- Ship Tease: With his friend Pandora (aka Bugsy Wugsy in the books).
- Shorter Means Smarter: Despite his height, he is a kid genius. The animated series constantly draws on this by pairing him off with Trap.
- The Smart Guy: Between his precious nature, meticulous note-taking and Gadgeteer Genius tendencies, Benjamin fits this trope to a T.
- Tagalong Kid: Is technically this trope, though a fairly competent one who rarely gets in the way.
Recurring Characters
Stilton Family Members
Aunt Sweetfur
Geronimo's aunt.
- Happily Married: To her husband Grayfur. When he disappeared in a shipwreck years ago and was presumed dead, she never gave up hope that he might still be alive. He turns up alive and well, and the two happily reunite in a loving embrace.
- Nephewism: She was the one who raised Geronimo and Thea, and it's unknown who their parents were or where they are.
William Shortpaws
- The Dreaded: Geronimo frequently worries about displeasing him, especially when it comes to how he runs The Rodent's Gazette.
- Everyone Has Standards: He admonishes Geronimo for skimping out on Christmas dinner in "The Christmas Toy Factory" due to being preoccupied with work, telling him that while work is important, spending time with one's family is even more important.
- Grumpy Old Man: William has a reputation for being loud, strict, and stingy, and often voices his displeasure at any sort of activities he deems "wasteful".
- Jerk with a Heart of Gold: As stern as he is with Geronimo, William still loves his grandson dearly and only wants what's best for him.
- Our Founder: William is the founder of The Rodent's Gazette, a fact he's not shy about mentioning to Geronimo, and occasionally threatens to take back control of the firm if he deems his grandson unworthy of running the paper.
- The Scrooge: He's incredibly stingy when it comes to spending. According to Geronimo, his favorite phrase is "All work and no play makes a mouse, rich, rich, rich!" That being said though, he's more than willing to splurge when the occasion is appropriate, and actually admonishes Geronimo for penny-pinching during the holidays.
- Ship Tease: With Countess Lola von Muenster in "The Hunt for the Golden Book". William has had feelings for her since their childhood, but never had the courage to admit them to her. He manages to win her affections, and the book ends with William and Lola going off on a globetrotting vacation together, with the heavy implication that they plan to elope.
- The Workaholic: Even if he rarely shows this himself, he firmly believes that everyone in his company should have this mindset... so long as it isn't the holiday season.
Friends and Acquaintances
Petunia Pretty Paws
A TV reporter and environmentalist, and Geronimo's main love interest.
- Adaptation Name Change: She's called Patty Spring in the graphic novels. However, they changed it back to her original name.
- Chuck Cunningham Syndrome: While Bugsy/Pandora appeared in the TV show, Petunia was not seen or mentioned.
- Cool Aunt: Bugsy Wugsy calls Petunia her "favorite aunt."
- Hair of Gold, Heart of Gold: She has blonde hair and is very polite and kind.
- Mama Bear: She doesn't take kindly to those who pose a threat to her niece Bugsy Wugsy.
- Nature Lover: She's an environmentalist by background and adores being outside in nature. She and her brother Wolfgang frequently travel around the world exploring different environments.
- Nice Girl: She's very friendly and kind, and her naturally sweet personality is part of the reason why Geronimo likes her.
- Ship Tease: Frequently with Geronimo. The two have a mutual attraction to each other, but neither one has been brave enough to voice their true feelings, although Petunia tends to be a bit more bold and upfront about her feelings. Her character profile in "Down Out and Down Under" even mentions that she would be all too happy to marry Geronimo.
Bugsy Wugsy
Animated version voiced by: Moneca Stori
The hyperactive niece of Petunia Pretty Paws. Bugsy Wugsy loves nothing more than going on fun adventures with her favorite aunt and "Uncle G", despite Geronimo's attempts to avoid her.
- Adaptation Name Change: In the graphic novels, she's named Pandora Spring, much like Petunia. However, it was changed back to Bugsy Wugsy halfway through the series.
- In the TV series, her name was Pandora yet again. Only this time, her last name was "Woz" instead of "Spring", but a couple of episodes referred to her surname as the latter.
- Affectionate Nickname: Her aunt calls her "Little Tornado".
- Age Lift: Like Benjamin, she was 12 years old in the animated series.
- Insistent Terminology: She constantly calls Geronimo her "Uncle G", despite his repeated denials.
- Invisible Parents: Downplayed. The only glimpse of Bugsy's parents are in a family tree in Down and Out Down Under, where it's shown that she's the daughter of Furry Paws, Petunia and Wolfgang's older sister. Aside from that brief mention, Bugsy's parents are largely absent, and most of her appearances in the series have her accompanying Petunia.
- Shipper on Deck: When she learns that Geronimo has a crush on her aunt Petunia, she immediately starts asking if he's going to marry her, then loudly declares that she's going to call her aunt and tell her about Geronimo's feelings for her.
- Ship Tease: She has a crush on Benjamin.
Creepella von Cacklefur
Hailing from Cacklefur Castle in the Mysterious Valley, Creepella is an enigmatic and creepy mouse with a mile-wide crush on Geronimo Stilton, feelings he doesn't exactly reciprocate. She stars in her own series of books in which she solves mysteries alongside her family.
- Abhorrent Admirer: She's hopelessly in love with Geronimo, but he doesn't feel the same way about her. It doesn't help that she constantly insists that she's his girlfriend despite his protests to the contrary.
- Breakout Character: Eventually starred in her own book series.
- Cool Aunt: She frequently dotes on her niece Shivereen.
- Creepy Good: As spooky as she and her family are, Creepella is a fundamentally good person and a very skilled journalist.
- Dark Is Not Evil: Creepella is a Nightmare Fetishist who lives in a Haunted Castle alongside a cast of equally creepy The Addams Family expies; however, none of them are evil in any way. Geronimo himself comes to understand by the end of his (initially involuntary) visit to Creepella's home that the von Cacklefurs are a regular family just like any other, if a little eccentric.
- Dub Name Change: Her name in the original Italian version is Tenebrosa Tenebrax, while Creepella von Cacklefur is what she's called in the English localization.
- Graceful Ladies Like Purple: Most of her outfits are purple.
- Hidden Depths: For all her macabre eccentricities, Creepella is surprisingly well-versed in history and is also an accomplished journalist and author.
- Mama Bear: Hurting her beloved niece Shivereen is a quick way to get on Creepella's bad side.
- Odd Friendship: She's incredibly close friends with Thea Stilton, Geronimo's sister. Geronimo notes how strange he finds this, considering the two girls' differing backgrounds, but also muses that their shared interest in journalism is likely what they first bonded over.
- She's Not My Girlfriend: Geronimo has to constantly remind Creepella that she is not his girlfriend or his fiancée, no matter how often she claims to be. Creepella typically doesn't pay a blind bit of notice to these protests, however.
- Yandere: She asks Benjamin if his uncle Geronimo has any admirers, so she can find out where they live and scratch their eyes out.
Hercule Poirat
Animated version voiced by: John Stocker
A well-known detective on Mouse Island and one of Geronimo's closest friends. He's constantly trying to drag Geronimo along on adventures to solve mysteries, much to the latter's chagrin.
- Captain Ersatz: He's a pretty clear reference to the famous fictional detective Hercule Poirot.
- Genius Ditz: As bumbling and banana-obsessed as he is, Hercule is a very intelligent and effective investigator, and always solves his cases despite any slip-ups.
- Hopeless Suitor: He has a huge crush on Thea Stilton, but she doesn't appear to be all that interested in him.
- The Prankster: He loves to play silly pranks on people, especially on Geronimo.
- Trademark Favorite Food: Bananas. He even has a banana-shaped car!
Bruce Hyena
An adventurous friend of Geronimo's who frequently tries to rope him into athletic escapades.
- Hopeless Suitor: Like Hercule Poirat, he has a huge crush on Thea Stilton, but since she's not interested in either of them, she much prefers to use her charms to pit them against each other.
- Leeroy Jenkins: He has a tendency to throw himself into dangerous scenarios without thinking about the potential risks first.
- Lovable Jock: He's incredibly athletic and never misses out on a chance for more exercise, and he's also very friendly with nearly everybody he meets.
- Shipper on Deck: In Mighty Mount Kilimanjaro, he expresses his approval of Creepella's feelings for Geronimo, and asks to be invited to the wedding, much to Geronimo's annoyance.
Antagonists
Sally Ratmousen
Animated version voiced by: Patricia Drake
The unscrupulous owner of The Daily Rat, the biggest competitor of The Rodent's Gazette, and Geronimo's most bitter rival.- Adaptational Hairstyle Change: In the TV series, she has long red hair, while in the books she just has blonde fur and no hair.
- Arch-Enemy: She runs a rival newspaper company to Geronimo's, and is always scheming to try and bring him down.
- Bad Boss: Paws Off, Chedderface! shows that she barely pays her employees a working wage, and refuses to allow them any vacation time. By the end of the story, thanks to the Stiltons using her Identical Stranger plot against her, she's made to bow to her employees' demands for better treatment. Her treatment of her lackey Simon Squealer in the TV series isn't much better.
- Dartboard of Hate: She has one with Geronimo's picture on it in her office.
- Even Evil Has Standards: In The Giant Diamond Robbery, Sally's profile states, "She's known for breaking the rules, except on the golf course, because that's unethical!" This is proven at the end when it's revealed that Sally's cousin, The Shadow, was trying to cheat so she can get away with the diamond, while Sally is absolutely appalled to see that her cousin would do something like that.
- Evil Is Petty: Many of her schemes involve trying to run Geronimo out of business, for seemingly no reason other than she wants to be the only newspaper on Mouse Island. When she's not trying to ruin Geronimo's life, she's abusing her employees or her henchman Simon Squealer.
- Freudian Excuse: Her description in Atlantyca's website states that she wanted to work for the Stilton Media Group, but she was rejected and now holds a grudge against them. Also, in Valentine's Day Disaster, it's mentioned that Geronimo once accidentally pushed her into a thorn bush, which might explain her hatred of Geronimo.
- Immoral Journalist: Sally is willing to try whatever unethical scheme she can to get a good story, and doesn't care who she has to step on to get her way. She'll also go to any lengths to try and run Geronimo out of business, including hiring an Identical Stranger to steal his identity, buying the News Express so that they'll only distribute her paper, or tricking Grandfather William into believing that The Rodent's Gazette is going bankrupt so that Geronimo will have to sell his home to make up the difference. This is a stark contrast to the Stilton Media Group, who always tend to stay true to their principals and only gat their stories through honest means.
- Pet the Dog: Despite her nastiness, Sally has had a few moments that have shown that she's not completely irredeemable:
- In Paws Off, Cheddarface!, even though she was essentially tricked into it by the Stiltons, Sally does agree to start paying her employees more and allows them to go on vacation. And there's no evidence to suggest that she ever went back on those promises.
- In Valentine's Day Disaster, she arrives at Geronimo's house during his Valentine's party to begrudgingly admit that she shouldn't have bought out the News Express, and offers to allow them to deliver The Rodent's Gazette again in exchange for an invitation to his party.
- In The Great Diamond Robbery, she's shocked to learn that her cousin Shadow was trying to cheat the competition so she could steal the diamond.
- The One Who Wears Shoes: In the animated series, she is one of the very few rodens who is not a Barefoot Cartoon Animal. This becomes a plot point in the episode "Barry the Moustache": when she is not really kidnapped by the titular mob boss, one of the clues to her whereabouts is one of her high heels.
The Shadow
A master thief and master of disguise who frequently comes into conflict with Geronimo. She is also Sally Ratmousen's cousin.
- The Dragon: As of Geronimo on Ice!, she's the number-one thief and associate of crime mogul Madame No.
- Femme Fatale: Shadow is very aware of her good looks and isn't above using them to escape from perilous situations, particularly when Geronimo is involved, as he's often susceptible to her charms.
- Master of Disguise: Her main MO involves using elaborate and extremely convincing disguises to pull of thefts and other crimes.
- Only Known by Their Nickname: Her true name is a mystery, and she's only ever called Shadow, mainly due to her ability to escape without a trace even when she's caught.
- Spell My Name with a "The": She's always specifically referred to as "the Shadow", rather than just "Shadow".
- Villain: Exit, Stage Left: Shadow almost always gets away when her plots are exposed.
Madame No
"I told you to watch out, rat! You should have known better! I'm one powerful mouse, and I won, I won, I won!"
A wealthy business mouse and head of EGO Industries, a large corporation that deals in both honest and shady endeavours. Her various business exploits have led her to cross paths with Geronimo many times.
- Absurdly-Long Limousine: Owns a leopard-printed one which she uses to get around.
- Card-Carrying Villain: She's a villain and she knows it, as told by her quote.
- Catchphrase: Will often respond to any question with a harsh "No!", especially in the graphic novels.
- Color Motif: She always wears leopard-printed clothing with matching accessories. This also extends to her bodyguards, limousine and even submarine; chances are, if something is covered in leopard-print, Madame No is involved.
- Corrupt Corporate Executive: The head of EGO Industries who often deals in rather unethical business like thievery, pollution and sabotage.
- Ecocidal Antagonist: Just one part of her business endeavours; "Hug a Tree, Geronimo" has her want to destroy the Great Oak Tree to build a mega shopping mall in its place, and "The Missing Movie" reveals that her company has also caused harm to the environment via pollution and forest destruction.
- Evil Redhead: Has an orange bobcut and quite a mean streak.
- High-Heel Power: Wears a pair of leopard-printed high heels and is the wealthy CEO of a company.
- Malicious Misnaming: Often calls Geronimo "Stinkton" in the graphic novels.
- MegaCorp: Her company, EGO Industries, deals in many businesses across Mouse Island such as real-estate, TV stations, newspapers and even airlines. EGO even stands for "Enormously Gigantic Organization".
- Rich Bitch: Is incredibly wealthy, but morally bankrupt.
- Secondary Color Nemesis: Wears leopard-print outfits and is one of Geronimo's most recurring foes.
- Sinister Shades: She is almost never seen without a pair of sunglasses.
- Villain Team-Up: Ever since "Geronimo on Ice!", she will often employ the Shadow to do dirty work on her behalf.
Characters introduced in the Kingdom of Fantasy series
Kingdom of the Fairies
Queen Blossom
- Arch-Enemy: To Cackle. Cackle despises Blossom for representing all things good and just, and is constantly trying to overthrow Blossom to rule the Kingdom of Fantasy.
- Babies Ever After: She and George have a daughter named Winglet in The Guardian of the Realm.
- Beauty Equals Goodness: Blossom is a beautiful, graceful fairy queen who represents all things good. Her arch-nemesis Cackle is equally beautiful, but is also manipulative and a tyrannical despot.
- Damsel in Distress: Many of Geronimo's adventures in the Kingdom of Fantasy involve harrying off on a quest to rescue Blossom when she gets kidnapped by Cackle or some other evildoer.
- Fisher Queen: The state of the Kingdom of Fantasy is heavily tied to Blossom's health and well-being, as first shown in The Kingdom of Fantasy, where her being placed under a sleeping spell leaves the Kingdom of the Fairies vulnerable to Cackle's magic. When she's abducted in The Amazing Voyage the lands are in danger of being overrun by an Endless Winter, and in The Hour of Magic, it's directly stated that should Blossom ever die, the entire realm would perish with her.
- Flower Motifs: Blue roses, which are often seen as symbols of beauty and mystery, feature heavily in Blossom's iconography and in her dress.
- Happily Married: To George, King of Dreams as of The Amazing Voyage.
- The High Queen: She rules the Kingdom of the Fairies, and many also consider her to be the queen of the entire Kingdom of Fantasy.
- Mama Bear: While she's typically very soft-spoken, harming her daughter Winglet is a fast way to earn Blossom's ire. In Guardian of the Realm, while she's still rendered bedridden after Winglet's abduction, she still has enough steel in her to passive-aggressively admonish Moonflower for falling asleep and allowing the abduction to occur.
- Really 700 Years Old: She looks to be in her early twenties, but is said to be over 200 years old, as well as immortal.
- Ruling Couple: She co-rules the Kingdom of the Fairies alongside her husband King George.
- True Blue Femininity: She has vibrant blue hair, wings, and clothes.
King George
- The Good King: He rules the Kingdom of the Fairies alongside his wife justly and kindly.
- Happily Married: To Queen Blossom as of The Amazing Voyage.
- Heel–Face Turn: He was forced by Cackle to wear a stone mask that made him heartless and cruel, and forced him to imprison Blossom in his castle. After Blossom sings him a heart-tugging fairy song about the benefits of kindness and love, something stirs in the king's heart that causes him to lash out and defy Cackle's orders. He subsequently defects from Cackle's cause and joins the heroes, later falling in love with Blossom and marrying her. It's heavily implied that George (then known as Grim) was already in love with Blossom previously, but hesitated to act on those feelings due to Cackle's interference.
- Long-Haired Pretty Boy: George has shoulder-length blue hair which he normally wears in a ponytail, and is quite handsome and elegant.
- Meaningful Rename: He changes his name to George upon marrying Blossom, which Geronimo agrees is a much more fitting name for Blossom's new consort.
- Ruling Couple: Alongside his wife Blossom, George co-rules the Kingdom of the Fairies.
Princess Winglet
- Nice Girl: She's very sweet and kind, and is described as having a pure soul.
- Ship Tease: With her friend Lorian.
- Strong Family Resemblance: She looks exactly like a younger version of her mother, Queen Blossom.
- Tomboy Princess: She frequently skips out on her meditation lessons to practice archery, much to the annoyance of her tutors. She also has to be told repeatedly by her mother to not ride her pet tiger through the palace halls.
- True Blue Femininity: Much like her mother, Winglet has vibrant blue hair, wings, and pale blue skin.
Princess Sproutness
Blossom's younger sister and the Fairy of the Earth. Her abduction in The Volcano of Fire is the inciting incident that prompts Geronimo and friends to go on a grand adventure to find her and bring the princess home.
- Damsel in Distress: She gets kidnapped by Sludge in The Volcano of Fire and is imprisoned in a cage deep underground, chained up and surrounded by a strange material called stinkstone which slowly drains her powers.
- Green Thumb: She has the power to make plants and flowers grow.
- Shipper on Deck: She applauds enthusiastically when Sterling and Thunderhorn announce their engagement towards the end of The Volcano of Fire.
- True Companions: She's incredibly close friends with Princess Emerald and Princess Sterling. When Sproutness gets kidnapped in The Volcano of Fire, Sterling immediately volunteers to go on the rescue mission, and Emerald was planning on joining as well, but her brother insisted that she stay behind.
Allies and companions
Scribblehopper
- Genius Ditz: Scribblehopper might be scatterbrained and long-winded, but he's also incredibly knowledgeable about the history and customs of the Kingdom of Fantasy, and it's his tips and pointers that help Geronimo escape from dangerous situations during his first visit to the various kingdoms.
- Giftedly Bad: While Scribblehopper is a decent writer and is great at embellishing the details to make a fantastical story, his poetry is less than stellar. Especially his attempts at rhymes.
- Motor Mouth: He tends to ramble a lot, both in general conversations and in his writing.
- Nice Guy: For all his long-winded mannerisms, Scribblehopper is very friendly and noble, and has remained one of Geronimo's closest friends in the Kingdom of Fantasy throughout his many adventures.
Strongheart
The last King of the Giants. Orphaned at a young age when an avalanche buried his family, he first meets Geronimo in The Kingdom of Fantasy as a nameless wanderer. He winds up joining Geronimo on his quest to rescue Queen Blossom, and subsequently rediscover his real name: Strongheart.
- The Faceless: In his introductory appearance, only parts of him are seen at a time (ie. A hand, foot, or his beard). Averted in subsequent appearances, where his whole face and body are shown in full.
- Gentle Giant: He's about the size of an apartment building and is massively strong, but Strongheart is very polite and friendly, and very apologetic if he accidentally steps on someone.
- Happily Married: To Beatrice as of The Amazing Voyage.
- Last of His Kind: He's the only resident of the Kingdom of the Northern Giants, with the rest of the population having been lost to a massive avalanche when he was young.
- Love at First Sight: He's immediately smitten with Beatrice the moment he meets her.
- Trademark Favorite Food: Onions, which is why his breath always smells so bad.
Princess Sterling
- Belligerent Sexual Tension: With Thunderhorn in The Volcano of Fire. The pair spend most of the first half of the book arguing with each other over who's plans they should follow, but after falling into the Fountain of Love, the two start treating each other with much more respect and tenderness. The story ends with the two getting engaged, and Vol explains to Geronimo that falling into the fountain didn't make them fall for each other, but rather brought their already preexisting feelings to the surface.
- Happily Married: To Thunderhorn as of The Volcano of Fire.
- Pretty Princess Powerhouse: She's a beautiful, blonde-haired young woman and a highly skilled archer and swordfighter.
- Princesses Rule: She's the reigning monarch of her kingdom, but goes by the title of "princess" rather than "queen". She does, however, become Queen of the Elves after marrying Thunderhorn in The Volcano of Fire.
- Royals Who Actually Do Something: She takes the governance of her kingdom incredibly seriously, and isn't afraid to get her hands dirty to solve a crisis. She's one of the first people to be recruited into The Fantasy Company to rescue Queen Blossom in The Amazing Voyage, and joins Geronimo on his quests in both The Dragon Prophecy and The Volcano of Fire. She also has the responsibility of guarding the last remaining dragon egg, the survival of which is crucial to the future of all dragons, and it's a duty she upholds with the utmost seriousness and dedication.
- True Companions: She has a very close bond with Princess Emerald of the Elves (Thunderhorn's sister) and Princess Sproutness (Blossom's sister), and the trio are inseparable friends. When Sproutness is abducted in The Volcano of Fire, Sterling is one of the first people to volunteer to go on the rescue mission.
King Thunderhorn
Click here to see his true appearance (SPOILERS)
The noble and brave King of the Elves. Appearing to outsiders only as a white deer, Thunderhorn first meets Geronimo on his journey to rescue Queen Blossom in The Amazing Voyage.
- Aloof Big Brother: He sometimes acts in a cool manner towards his younger sister Emerald, but is generally a pleasant and well-meaning brother.
- Belligerent Sexual Tension: With Sterling in The Volcano of Fire. The pair spend most of the first half of the book arguing with each other over who's plans they should follow, and just generally getting on each other's nerves. However, after falling into the Fountain of Love, the two start treating each other with much more respect and tenderness. The story ends with the two getting engaged, and Vol explains to Geronimo that falling into the fountain didn't make them fall for each other, but rather brought their already preexisting feelings to the surface.
- Big Brother Instinct: He completely forbids his sister Emerald from joining him, Geronimo, and Sterling on their journey to rescue Sproutness in The Volcano of Fire, reasoning that it's far too dangerous for her to come along. He's able to convince her to stay behind after a bit of reasoning, and assures her that he's only trying to keep her out of harm's way.
- Forced Transformation: At the climax of The Dragon Prophecy, Thunderhorn is revealed to have been cursed by Cackle years ago into assuming the form of a white deer, and is restored to his true elven form when Geronimo uses the magic healing water from the Garden of the Seven Sisters on him.
- Happily Married: To Sterling as of The Volcano of Fire.
- Not So Above It All: While he puts up the facade of a stoic king most of the time, Thunderhorn is shown to have a very goofy sense of humour and a bit of a prideful streak, as best shown when he gives a very cheeky "I told you so!" smirk to Sterling when his trust in Captain Coldheart is proven to be well-placed. He's also known to have been a notoriously troublesome student in school when he was younger. When Thunderhorn gives a lame excuse for not wanting to travel with Geronimo to see Professor Longwind in The Volcano of Fire, Emerald just laughs and says her brother just doesn't want to face his old teacher.
Blue Rider
- Arrogant Kung-Fu Guy: Downplayed. Blue Rider loves to boast about how he's "the best of the best" and is very confident in his own abilities, however he backs up this bragging with actual skill, and is really a kind person deep down.
- Blue Is Heroic: His outfit is blue and he has a blue birthmark on his forehead, and he's a very brave, noble young man.
- Distinguishing Mark: He has a blue heart-shaped birthmark on his forehead. He shares this unusual mark with Tenderheart, and it's seen as a sign that the two are destined to be together.
- King Incognito: Blue Rider is a wandering knight with an implied aristocratic heritage, and he's later revealed to be the son of King Azul of Sapphire City.
- Official Couple: With Princess Tenderheart, who he was destined to fall for according to the Ancient Gemstone Prophecy.
Chatterclaws
- Buffy Speak: He often forgets certain words, instead using replacements like "whatchamacallits" to fill in the gaps.
- Motor Mouth: True to his name, Chatterclaws is very chatty, and spends most of his and Geronimo's adventure talking the latter's ear off.
- Official Couple: With his girlfriend Classyclaws. The two get married at the end of The Enchanted Charms.
- Try Not to Die: Most of his advice to Geronimo throughout their adventure is about how he should try his best to not die along the way, and he's very blunt about the dangers Geronimo will face.
Major Antagonists
Queen Cackle
- Ambition Is Evil: Cackle is described as being the most ambitious of the Seven Witch Sisters, and often puts her own schemes and desires first and above all other priorities.
- And Now You Must Marry Me: She once tried to have Mel the Magnificent marry her many years ago, but he flatly refused, knowing just how power-hungry the witch queen was. In her rage, Cackle declared war on Mel and his kingdom, which prompted Mel to form the Secret Alliance with Blossom, Clever the Chameleon, and the Lady of Dreams.
- Arch-Enemy: To Blossom. Cackle wholeheartedly detests Blossom and everything she stands for, and is heavily implied to be jealous of Blossom's extreme popularity with the citizens of the Kingdom of Fantasy.
- Beauty Is Bad: Queen Cackle is a striking beauty with vibrant red hair and a shapely physique, but is also a cold-hearted tyrant who frequently plots to overthrow Blossom and take over her kingdom.
- Faux Affably Evil: Cackle initially puts up the facade of a patient, gracious host when she first meets Geronimo in The Kingdom of Fantasy, but Geronimo and Scribblehopper both agree that something is very off about her. But when Geronimo declines her offer to stay for a meal (which would render him trapped in the Kingdom of the Witches forever), she tries to fry him with lightning and feed him to her dragon. He's only able to escape her wrath by giving her the mandrake plant from his music box.
- Evil Redhead: She has scarlet red hair and a very violent temper to match.
- God Save Us from the Queen!: Cackle is a cruel and manipulative tyrant obsessed with her own personal glory and power, and frequently schemes to take over the Kingdom of Fantasy.
- Hair-Trigger Temper: Whenever Cackle doesn't get her way, she'll immediately fly into a rage, stomping her feet and shrieking in fury.
- I Have Many Names: Cackle has numerous aliases and titles she goes by, most of them relating to her wicked nature. The full list includes: The Never-Named, The Queen of Darkness, The Empress of Evil, The Sorceress of Sorrow, The Teacher of Terror, The General of the Dark Army and All Things Unruly and Rotten, The Black Queen, The Lady of Chills, The Empress of Nightmares, The Sorceress of Sorcerers, Your Nastiness, The Teacher of Spells, The Powerful Mistress, The Witchiest Witch, The Lady-General of the Armies of Darkness, She Who Commands the Terror and Governs the Creatures of the Night.
- Mark of the Supernatural: She has one green eye and one black eye.
- Shock and Awe: She has the ability to shoot lighting from her fingertips, specifically her pinky finger.
- Toxic Friend Influence: To Wither. She was the one who sent the scarlet butterfly to sting Wither and corrupt her into wickedness, and became a sort of Evil Mentor to the young fairy.
- Villain: Exit, Stage Right: She frequently escapes at the ends of her confrontations with Geronimo, swearing revenge on him and Blossom.
Wither (UNMARKED SPOILERS)
- Abusive Parents: She only sees her daughter Flamelet as a means to serve her own desires, and constantly belittles her for failing to be properly wicked. When Flamelet undergoes a Heel–Face Turn and sides with her cousin Winglet and Geronimo, Wither flies into a rage and immediately tries to destroy them, not caring at all that her own daughter is in the blast zone.
- Cain and Abel: She's the Cain to Blossom's Abel. Wither despises her benevolent twin sister, and after falling in with Cackle, she joins in on the witch queen's plot to overthrow Blossom and rule the fairies.
- Dragon Ascendant: After overthrowing Cackle in an election to become the new Queen of the Witches in The Dragon of Fortune, she forces Cackle into exile and brings both the kingdoms of the dark fairies and witches together into one, becoming the new primary antagonist of the series.
- Evil Aunt: To Princess Winglet. Several of her schemes involve targeting Winglet in some way, in order to get back at Blossom and rule the Kingdom of the Fairies herself.
- Evil Twin: She's Blossom's identical twin sister, but has none of the kindness and generosity of her sister, largely due to Cackle's influence. Wither is practically indistinguishable from Blossom when she dresses like her, but her drastically different personality is what first tips off Geronimo that something isn't quite right.
- Flower Motifs: In contrast to her sister's association with blue roses, Wither is heavily associated with black roses, which are said to represent death, danger, and hatred.
- God Save Us from the Queen!: Wither is a destructive and cold-hearted ruler, as well as impatient and ambitious, and is willing to try whatever scheme she can to achieve her goals.
- Imposter Forgot One Detail: When she abducts and imprisons Blossom in The Phoenix of Destiny, Wither is practically indistinguishable from her twin. However, her impatient and petulant personality slips through despite the disguise, which immediately tips off Geronimo that something is wrong.
- Kill and Replace: She uses the more kid-friendly "imprison and replace" in The Phoenix of Destiny when she impersonates her sister Blossom so she and Cackle can rule the Kingdom of the Fairies.
- Unholy Matrimony: With Crowbar the Cruel. They're both unrepentant liars and manipulative masterminds, but they're also incredibly loyal to each other and appear to have a very stable and loving marriage.
- The Usurper: She overthrows Cackle in The Dragon of Fortune and becomes the new Queen of the Witches, causing the disgraced witch to flee into exile.
Other Antagonists
King Firebreath III
The King of the Fire Dragons, first introduced in The Kingdom of Fantasy as one of the many monarchs Geronimo meets along his quest. He later returns in The Dragon Prophecy in a more antagonistic role, when the last dragon egg is stolen, and he becomes a prime suspect.
- Ascended Extra: Originally, Firebreath was introduced as just one of many various kings and queens that Geronimo met in his first adventure across the Kingdom of Fantasy, and his role there was simply to allow Geronimo passage through his kingdom to reach the Emerald Door and the Kingdom of the Pixies. He's given a much more prominent role in The Dragon Prophecy, where he's much more arrogant and antagonistic towards Geronimo, and tries to have Sterling blamed for the loss of the dragon egg (which he actually orchestrated).
- Green-Eyed Monster: He's quite openly jealous of Princess Sterling and her popularity, to the point where he tries to frame her for the abduction of the last dragon egg so he can take over her kingdom.
- King Bob the Nth: He's styled as King Firebreath III to emphasis his lineage.
- Sweet Tooth: One of his first orders upon receiving his new gold tooth in The Kingdom of Fantasy is for his royal chef to bring him as much chewy and sticky candy as possible, now that he can actually enjoy it.
- Took a Level in Jerkass: In his first appearance, Firebreath is a gruff but ultimately reasonable ruler with an implied sentimental side (if his crush on Princess Ashley is any indication) and willingly allows Geronimo and Scribblehopper to pass through his realm to the Kingdom of the Pixies. But come his return in The Dragon Prophecy, he's much more hostile towards Geronimo, openly mocks his designation as the prophesied Twelfth Knight, and tries to pin the blame of the loss of the dragon egg on Princess Sterling. He even went so far as to orchestrate the kidnapping of the dragon egg alongside Queen Cackle in the hopes that Sterling would be held responsible and banished from her kingdom, leading him free to rule over both dragon kingdoms. He gets better.
Sludge
A shape-shifting mud monster and the main antagonist of The Volcano of Fire. He organized the abduction of Princess Sproutness, forcing the people of the Diggerts Kingdom to mine stinkstone to weaken the fairy princess. His plan is to drain all of her magic and transfer it to himself, giving him the power to become human and rule the Kingdom of Fantasy.
- Become a Real Boy: Sludge's ultimate desire is to become human, which he believes he can achieve by absorbing all of Princess Sproutness' power.
- I Know What You Fear: He feeds on the fears of others, and has the ability to transform into whatever his victim fears the most. When tormenting Geronimo, he takes on the form of a gigantic, hungry cat with fiery red eyes.
- I Want My Mommy!: He screams out "Get my mommy!" when the waters of the River of Oblivion start rushing into his lair.
- Kill It with Water: Sludge's greatest weakness is water, as it's the only thing that can melt him. He's ultimately defeated when the River of Oblivion bursts its banks into his chambers and he's washed away by the sudden rushing current.
- Muck Monster: In his true form, Sludge resembles a walking pile of mud with glowing red eyes.
Scorcher
The self-proclaimed Empress of the Witches and the main antagonist of The Search for Treasure. Having come into possession of the magical Royal Ruby, Scorcher plans to unite it with the power of the Royal Sapphire to gain immense power and overthrow the Kingdom of Fantasy.
- Face–Monster Turn: Many years ago, Scorcher was known by her real name of Delia. She was the wife of King Azul of Sapphire City and the mother of Blue Rider. But one day, Cackle sent a serpent to abduct Delia's infant son, and when she tried to protect him, the serpent bit her and the venom caused her to transform into the wicked Scorcher.
- God Save Us from the Queen!: She calls herself the Empress of the Witches and is a thoroughly rotten and power-crazy person. Once Azul heals her with the Sapphire Water, she turns out to really be the much more benevolent Queen Delia of Sapphire City.
- Mama Bear: The only reason Cackle was able to turn her evil in the first place is because Delia put herself between the wicked serpent and her infant son, causing the snake to attack her instead of Blue Rider.
- Red Eyes, Take Warning: She has red eyes that resemble the color of burning coals. As her true self, she has bright blue eyes.
- True Blue Femininity: As her true self, Delia wears a sky blue gown.
- Walking Spoiler: It's very difficult to talk about Scorcher without giving away her true identity.
Wizard of the Black Pearl
The main antagonist of The Enchanted Charms. Having been banished for one thousand years by Queen Blossom for a previous plot to take over the Kingdom of Fantasy, this master of the dark arts plans to steal the magical Enchanted Charms and harness their power to enact his revenge.
- Disney Villain Death: After being separated from his wizard hat, which acts as his power source, he meets his doom by being knocked off his clam shell throne and into the ocean abyss below.
- Intangible Theft: As punishment for the Red-nosed Gnomes not handing over their magic charm, the Wizard used his black pearl to steal all the colors in the Rainbow Valley, leaving everything gray and dreary.
- Only Known by Their Nickname: He's only referred to as the Wizard of the Black Pearl, and his true name is a mystery.
- Purple Is Powerful: His robes are a dark purple, reflecting his abilities as a powerful wizard.
- Trademark Favorite Food: Crab soup, which he makes a point of mentioning repeatedly to terrify Chatterclaws.
Eclipse
- Evil Genius: She's said to be the smartest of the witch sisters, and is definitely highly intelligent when it comes to spellcasting.
- Older Than They Look: Due to stealing Blossom's youth, Eclipse appears to be much younger than she really is. When Geronimo breaks the spell affecting time, Eclipse reverts to her true age, becoming extremely wisened and wrinkled.
- Vain Sorceress: She's obsessed with her own beauty, to the point where she sabotages the Tick Tock Timepiece to move faster and steals Blossom's beauty to boost her own.
- Vocal Dissonance: Her voice is very raspy and deep, which Geronimo notes is a sharp contrast to her elegant features. It's one of the first hints that Eclipse isn't nearly as young and beautiful as she appears to be.
Characters introduced in the Thea Stilton series
The Thea Sisters
The Thea Sisters in General
Left to right: Paulina, Pamela, Colette, Nicky and Violet.
Click here to see them in the later books.
A group of young mouselets who attend Mouseford academy. The group gets their name from Thea Stilton who teaches them their journalism courses and serves as their mentor. The Group consists of Nicky, Violet, Colette, Paulina, and Pamela. Since their fateful meeting, The group has found themselves caught in a number of adventures, which their mentor documents in a series of books.
- Amateur Sleuth: They have proven themselves to be quite the detectives, despite still being in college.
- Color-Coded Characters: Nicky (green), Pamela (red), Paulina (orange), Violet (purple), and Colette (pink).
- A Day in the Limelight: While generally the Thea Sisters all get an equal among of page time, some stories tend to give more focus to one of the girls over the other four, usually whenever the group visits one of their home countries and/or family.
- Fire-Forged Friends: Downplayed compared to most examples of this trope, but it's not until the end of their first adventure that they become the near inseparable group they are today.
- Multinational Team: Nicky is Australian, Colette is French, Violet is Chinese, Paulina is Peruvian, and Pamela is a Tanzanian-born American. Some of their adventures even take place in their home countries.
- Nice Girl: All of them are very kindhearted individuals and are willing to help anybody in need.
- No Full Name Given: Their last names have never been revealed, with two exceptions: according to the graphic novel The Treasure of the Viking Ship, Pamela's surname is Tangu, and though it is never outright stated in the books, Violet's family name is Chen.
- Right Mice in the Wrong Place: Just about how half of their adventures could be summed up. They go to visit some place and then just happen to get caught up in a mystery only they can solve.
Nicky
- All Girls Like Ponies: She's an expert horseback rider, owing to her background of growing up on a ranch back in Australia.
- Awesome Aussie: Born and raised in Australia and is the most athletic and energetic of the Thea Sisters.
- Animal Lover: Can befriend animals almost as easily as regular mice.
- Badass Native: It's confirmed that at least one side of Nicky's family is Aborigine Australian, and she goes on all sorts of adventures worldwide.
- Claustrophobia: Her greatest fear.
- Love Triangle: She and Paulina end up in one with Ashvin in The Ice Treasure, with both girls competing for Ashvin's affections. Eventually they realize that this rivalry is impacting their friendship, and they both give up their respective pursuits.
- Master Archer: In The Dance of the Star Fairies, Nicky is shown to have skill in archery, having practiced in her family's ranch to the point where she's practically an expert.
- Nature Lover: This is best demonstrated by her "secret ambition" of becoming an ecologist, a branch of biology dedicated to studying the relationships between organisms and the environments they live in. She's also part of "The Green Mice", an ecological organization, alongside Paulina, and is very knowledgeable in the physiology and behavioral patterns of animals.
- Outdoorsy Gal: Nicky is described to be "always in a good mood, as long as she's outdoors".
- Passionate Sports Girl: In Big Trouble in the Big Apple, Nicky runs the Big Apple Marathon representing Mouseford Academy.
- Ship Tease: With Nate MacCardigan in Mountain of Fire, and with Renani in The Legend of the Fire Flowers.
- Tomboyish Name: Nicky is technically a gender-neutral name, and Nicky the mouselet is very much a tomboy.
Colette
- Broken Pedestal: Surprisingly in a few stories, Colette and the rest of the Thea Sisters come across a famous person (often influential in the world of fashion) she looks up to, only to eventually find out they are less than pleasant people in reality.
- Dude Magnet: Out of all the Thea Sisters, Colette is the one who often gets the most romantic attention from boys, including Vince Guymouse and Prince Lakshan. She's also seen enjoying the attention of a small group of male ballet dancers in one illustration in The Dancing Shadows.
- Everyone Looks Sexier if French: In a child-friendly way. Colette is French and enjoys taking care of her appearance.
- The Fashionista: It has been noted on at least one occasion that Colette struggles with packing all her favourite outfits into one suitcase (though she learns to be more practical in later books), and she is overall very fashion-savvy. Her cousin Julie is also a fashion design student.
- Gay Paree: Subverted. She was raised in Arles, Provence in southern France, though she later moved to Paris with her cousin Julie in high school.
- Gratuitous French: Surprisingly subverted, as she is rarely seen using any simple French or exclamations, and those that she uses are said very sparingly.
- French Jerk: Downplayed. Colette has a vain and prideful streak, but is usually a Nice Girl like the rest of the Thea Sisters.
- Girly Girl: Colette is fairly concerned for her appearance in more than one way.
- Identical Stranger: She meets a mouseling named Carlotta in The Dancing Shadows who could easily be mistaken for Colette's long lost twin. The two girls actually use this uncanny resemblance to their advantage when the villains try to lock Carlotta in her room to prevent her from participating in the dance audition. Dressing in the same outfits, Colette trades places with Carlotta and allows herself to be caught, tricking the villains into believing they've captured Carlotta while the real Carlotta escapes.
- Jerk with a Heart of Gold: Most of the time, she's just as nice as the rest of the Thea Sisters. But she does have moments where she can be quite vain and even snooty.
- Lots of Luggage: It's a frequent Running Gag in the series that whenever the Thea Sisters have to travel anywhere, Colette is always the one with the most luggage.
- Long Hair Is Feminine: Colette has long, blonde hair/fur and is the girliest member of the Thea Sisters.
- The Nicknamer: In the French and Italian versions, Colette has a penchant for giving the other Thea Sisters nicknames, with Nicky, Pamela and Paulina being given the nicknames Nic, Pam and Pauly (Pilla in the French), respectively.
- Odd Friendship: With Violet. The two have drastically different personalities and clashed with each other in the earliest books, but they have since settled their differences.
- Pink Means Feminine: She embraces this trope to a T, to the point were it's listed as her prime interest in her official bio.
- Ship Tease: With Prince Lakshan in The Prince's Emerald. He quickly becomes infatuated with her after hearing her laughter at the airport, and the two frequently blush vividly around each other throughout the story.
- Spoiled Sweet: Given her overall mannerisms, it's heavily implied she comes from wealth, but she's nonetheless a pretty nice person.
- Took a Level in Kindness: It is implied in the later books that she does learn to be more sensitive and doesn't make sarcastic and snide remarks nearly as frequently as she used to.
Violet
- Asian and Nerdy: Violet is Chinese and loves reading.
- Beware the Quiet Ones: Violet may be shy and soft-spoken, but she can and will speak her mind when called for. Case in point: in The Dancing Shadows, when one of the most respected dance judges in the world demeans the Thea Sisters' new friend for being self-taught, Violet launches into a "The Reason You Suck" Speech about how a ballerina's talent should be how they're judged, not how they trained, stunning the judge and convincing him to give the friend a chance to prove herself.
- Bookworm: She loves reading, to the point that Thea calls her a "real intellectual, just like [Thea's] brother, Geronimo".
- Calming Tea: Violet's "secret" is that she likes to unwind by listening to Classical Music and drinking green tea.
- Defrosting the Ice Queen: Subverted, but in the first book. She was more closed off to the others. She becomes friendlier after talking to Thea.
- Eagle-Eye Detection: Is noted to be very observant of her environment and notices even the smallest of details. This quirk has helped out in a good amount of mysteries throughout the series.
- Elegant Classical Musician: Her preferred style of music tends to lean towards the classic variety, and she herself plays the violin. It's also mentioned that her father is apparently a renowned orchestra conductor.
- Graceful Ladies Like Purple: She often wears purple and is an Elegant Classical Musician.
- Meaningful Name:
- She can be shy sometimes... in other words, she's a Shrinking Violet.
- In-universe, her name was chosen for her by her grandfather, who found a violet blooming in his greenhouse the day she was born despite violets being out of season. It's also her favourite flower, though the English translation of The Cloud Castle claims her favourite is the purple orchid.
- Odd Friendship: With Colette. The two have drastically different personalities and clashed with each other in the earliest books, but they have since settled their differences.
- The Perfectionist: Jan describes Violet to be one in The Great Tulip Heist, and her perfectionism ends up being one of the main conflicts in the book Mice Take the Stage.
- The Quiet One: Is generally a very shy girl and while she does enjoy the company of her friends, tends to prefer her books and study. She even has a severe problem with stage fright.
- Shrinking Violet: Despite this, as the series goes on, she becomes more open and social.
- Smart People Play Chess: Violet is skilled in chess, to the point where the Thea Sisters acknowledge her as the group's resident chess expert in The Mystery on the Orient Express.
- Teacher/Student Romance: She has a one-sided crush on Professor Ian Van Kraken in The Ghost of the Shipwreck.
Paulina
- Big Sister Instinct: She's noted to be very protective of her younger sister Maria, especially after their parents went missing when the sisters were young.
- Braids of Action: Paulina is usually seen wearing her hair in a long braid, and she's very skilled at computer science as well as being an Amateur Sleuth.
- Chronic Hero Syndrome: The rest of the Thea Sisters like helping people, Paulina loves to.
- Cool Big Sis: Paulina has a little sister, Maria, and given what kind of mouse Paulina is, it's more than likely she is this trope.
- Disappeared Dad/Missing Mom: Her parents went missing for unknown reasons when Paulina was younger, so she and her younger sister Maria live with their aunt and uncle.
- Love Triangle: She and Nicky end up in one with Ashvin in The Ice Treasure, with both girls competing for Ashvin's affections. Eventually they realize that this rivalry is impacting their friendship, and they both give up their respective pursuits.
- Nature Lover: She's part of "The Green Mice", an ecological organization, alongside Nicky.
- Ship Tease: With Will Mystery in the hardcover series. The two are repeatedly shown blushing around each other during particularly emotionally charged moments, and several characters frequently remark on their bond. Will even wakes her up from an enchanted sleep in The Cloud Castle with a kiss on the paw, in a moment highly reminiscent of the iconic scene in Sleeping Beauty.
Pamela
- Aw, Look! They Really Do Love Each Other: Pam calls out for Vic to be careful and Nicky pokes fun at Pam's concern for him in spite of their constant bickering.
- Badass Pacifist: Is a generally pacifistic girl, but this doesn't mean she's meek.
- Big Applesauce: Where she was raised.
- Big Eater: Pam is often mentioned to be eating during the narration.
- Celibate Hero: Pamela is currently the only member of the Thea Sisters who hasn't had a crush on anyone in the mainline series, although a fellow student named Shen is noted to have a crush on her in the Mouseford Academy series, and Vic de Vissen has flirted with her occasionally in the comics.
- Cool Big Sis: To her younger siblings, especially because she in particular.
- Drives Like Crazy: Along with being the peacekeeper, she's also usually the group's Designated Driver... and she's one who can be quite reckless.
- The Heart: You'd have to be if your the appointed peacekeeper of a group.
- Leeroy Jenkins: Pam is noted to be very impulsive.
- Massively Numbered Siblings: Big Trouble in the Big Apple reveals that Pam is one of ten siblings in her immediate family.
- Trademark Favorite Food: Almost every book in the series has at least one mention of pizza thanks to her.
- Why Did It Have to Be Snakes?: She's not very fond of insects.
- Wrench Wench: Give her a screwdriver and she can solve almost any mechanical problem.
Recurring Characters
Will Mystery
- Birds of a Feather: With Paulina. They're both computer geniuses with a appreciation for nature and technology.
- Distressed Dude: He gets trapped inside an ice crystal by the frost fairies in The Secret of the Snow, who refuse to listen to the pleadings of the Thea Sisters to let him go. Paulina is able to free him by tapping into their "bond of true affection" and hugging the crystal surrounding him, breaking the spell.
- Nice Guy: He's very friendly and courteous to anyone he meets.
- Ship Tease: With Paulina. The two have a lot of interest in common and have a tendency to blush around each other a lot during emotionally charged moments. Even other characters outside the Thea Sisters' social circle tend to comment on the pair's special bond.
- The Smart Guy: He's very intelligent and analytical, and is typically the one who organizes the more intricate details of the I.I.S's secret missions.
Vissia de Vissen / Rebecca Flashyfur
- Corrupt Corporate Executive: She's owner of de Vissen Inc., a top cosmetics and luxury living brand. She's also an unrepentant intelluctual thief and a regular law-breaker.
- Gotta Have It, Gonna Steal It: When the shopkeeper at the bazaar refuses to sell her the forumla for Asa's Perfume, she hires the Break-In Brothers to steal it from the establishment.
- Laser-Guided Karma: Her illegal private aquarium of endangered marine species is discovered and she's forced to go along with Colette's fabrication about her doing it to secretly save, and eventually re-release the protected animals into the wild.
- Parent-Child Team: She and Vanilla share correspondence to keep tabs on events happening on Whale Island that could potentially get in the way of Vissia's newest illegal architectural project.
- Screw the Rules, I Have Money!: Also Screw the Rules, I'm Famous! She frequently flounces local and international laws to pursue her own vanity projects, and if caught, she'll lie to make her actions appear charitable.
- Stage Mom: She expects perfection from Vanilla, setting her up with networking oppurtunities and resources, finetuning her brand image, discouraging potential suitors, and expressing acute disappointment and criticism when Vanilla fails to live up to her expectations.
Vanilla de Vissen / Ruby Flashyfur
- Adaptation Name Change: She's named Vanilla de Vissen in the comics.
- Adaptational Villainy: While Ruby in the books is by no means pleasant, willing to cheat, manipulate, and bully the sisters; Vanilla from the comic series is outright complicit in some of her mother's criminal schemes such as animal poaching.
- Alpha Bitch: She's the most popular girl in Mouseford Academy. Unfortunately, she tends to cheat in competitions in order to win, bullies and belittles her peers (even her Girl Posse), and finally, has a bitter hatred for the Thea Sisters.
- Consistent Clothing Style: Her outfits are typically light green with hints of blossom pink. She's also one of the few characters to consistently wear shoes, usually calf-length boots.
- Dick Dastardly Stops to Cheat: Any time she's competing in an event or competition, Ruby frequently tries to find a way to sabotage her competitors, even exploiting the support of her own friends and her brother to get ahead.
- Evil Redhead: She's more jerkish than evil, but Ruby has bright red hair and is a thoroughly unpleasant person.
- Inferiority Superiority Complex: She arrives at Mouseford Academy and is immediately wary of the Thea Sisters' apparent popularity rivaling her own.
- In-Series Nickname: Her brother's nickname for her is "Nilla" in the comics.
- It's All About Me: Ruby is quickly established to be a completely self-centered primadonna who only cares about herself, and is repeatedly shown to be prideful and attention-seeking. Whenever an event in Mouseford or Whale Island is announced, the first thing Ruby does is fantasize about how said event will catapult her to popularity and stardom. She'll even go as far as to try to ruin the reputations of her teachers and fellow students if she doesn't get her way.
- Karma Houdini: She puppet-masters Connie into cheating to win the Lizard Club competitions, but when nothing works out, Connie is the only one to suffer the consequences, and Vanilla is never caught.
- Like Parent, Like Child: It's heavily implied that Ruby got her habit of scheming and using underhanded tactics from her mother Rebecca, who is shown to indulge in the same nefarious and sketchy schemes her daughter does on the regular in the comics.
- Following in Relative's Footsteps: She strives to be as successful and popular as her mother.
- Rich Bitch: Her mother is the CEO of a popular cosmetics company, a fact that Ruby frequently uses to her advantage.
- Sitcom Arch-Nemesis: Ruby hates the Thea Sisters with a passion! Because of this, she always tries to beat them and get them in trouble just for the sake of ruining their good reputations.
- "Well Done, Daughter!" Girl: One of Ruby's main motivations is to please her mother, Rebecca, who constantly pressures Ruby to succeed.
Vic de Vissen / Ryder Flashyfur
- Adaptation Name Change: He's named Vic de Vissen in the comics.
- Adaptational Personality Change: In the comics, Ryder is portrayed as a smug jerk who looks down on others much like his sister, he personally invites Pam to dance as a means to insult her and threaten the Thea Sisters. In the books Ryder is, at worst, a bit of a quiet loner, he's also a on friendlier terms with the his classmates and often hangs out with some of the other guys on campus. Additionally, while he actively likes to make his sister look bad in the comics, the books Ryder just steers clear of her schemes.
- Annoying Younger Sibling: Will gladly take any opportunity to embarrass Vanilla and undermine her ego.
Vic: Aggravating Vanilla is my favorite sport!
- Big Little Brother: He is a few inches taller than Vanilla.
- Big Man on Campus: Vic is the most popular guy on campus; even the Lizard Club president has a crush on him.
- Break the Haughty: Completely panics during the go-kart puzzle because he didn't realized the competition would be that hard when he snarkily accepted Craig's challenge.
- Character Development: He's goes through a slow transformation in the comics to become an ally to the sisters. Intially, he'd help the Thea Sisters if it benefited his family's reputation or entertained him, but he helps them in later books because it's simply the right thing to do.
- Consistent Clothing Style: His main garment is always teal blue. And unless he's dressed up for an event or sport, you will never find Vic without his trusty leather jacket.
- Cracks in the Icy Façade: Speaks against his own mother's pollutionary actions, even though most would have the impression he doesn't at all care about the family business and he does eventually help her cover it up.
- Delegation Relay: He tells Tanya to pass off the winter festival coordination details to Craig, one of his "assistants".
- Dumb Jock: He's very good at boat racing, but was seriously hurting during the Gecko club academic and puzzle competitions.
- Everything's Sparkly with Jewelry: When dressing nice for a party, he wears a necklace with a small gold ornament.
- Evil Redhead: Subverted. He'll look the other way when necessary, but very rarely does he instigate trouble.
- Friendly Enemy: Recieves help from Shen throughout the competition despite them being direct competitors, starting a sort of Odd Friendship for the duration of the book.
- Heroes' Frontier Step:
- In Catching The Giant Wave, he selflessly dives into the ocean to save Gary Moon from drowning.Pam: Vic's the hero of the day!
Vic: Certainly no hero! I saved mom's little star. Otherwise, you know she would have burst my eardrums with her complaints! - In The Secret of the Waterfall, he actually takes offense with Vanilla calling the Thea Sisters stuck-up and joins the team on their bear investigation in the woods, not informing his mother of their plan ahead of time like he usually would.
- In Catching The Giant Wave, he selflessly dives into the ocean to save Gary Moon from drowning.
- I Am Not My Father: When the rerouting of the Whale Island waterfall is once again discovered to be the work of de Vissen Inc., Vic is quick to defend himself and say he's the one there helping the group stop his mom this time.
- Jerk with a Heart of Gold: He can be rude and condescending depending on who he's with, but generally commits more acts of kindess than vitriol.
- Lonely Rich Kid: Doesn't actually have any friends till he meets the Thea Sisters.
- Moral Pragmatist: He has split loyalty to his mother because he, like Vanilla, believes in preserving the Family Honor and will help the Thea Sisters if his mother has something to gain from it. This lasts up until the fifth book, where he takes a definitive step towards redemption.
- Royal Brat: He lives on a yacht, gets around by helicopter and recieves positive (and jealous) attention because he's the son of an extremely wealthy and influential woman.
- Screw the Rules, I Have Connections!: Although less and less he likes being associated with his mom, on rare occasions, he'll pull the "my mom is Vissia de Vissen" card to get him and his allies out of sticky situations.
- Snooty Sports: He's quite good at competitive sailing, likely because he lives on a yacht and what else is there to learn when you live on a yacht?
- Student Council President: He's the Gecko Club president. However, he doesn't care about club activities; having the bragging rights to power is enough responsibility.
- The Unfavorite: He knows his mom invests more time and love into Vanilla.
- Unexpected Kindness: Pamela is surprised when Vic offers the gang his motorboat so they can catch up to the Break-In Brothers.
- Unresolved Sexual Tension: Between him and Pam, especially in the first and fifth books of the comics.
- White Sheep: He's the only de Vissen capable of doing the morally right thing even when he doesn't benefit from it.Henchman: I don't believe it! Who can tell if he's really Ms. de Vissen's son?
Colette: You're right! Sometimes we don't believe it either!
Sardinia Squid
- Adaptational Name Change: She's called "Elly" in the mainline series.
- In-Series Nickname: Everyone calls her Dina.
- Tangled Family Tree: She has three wildly different-looking sisters, is engaged to Leo the fisherman, whose mom is a distant cousin of the Squids, who is the wife of Devon the fisherman, whose daughter is Marge the chef.
Professor Ian Van Kraken
- Absent-Minded Professor: He's notoriously a little difficult to work with because he's prone to being distracted by his research and forgetting important engagements.
- Attention Deficit... Ooh, Shiny!: He was supposed to plan a ceremony for the whale migration, but was sidetracked opening new lab equipment sent by de Vissen Inc.
- Hot Teacher: He's a marine biology professor and is a conventionally attractive young mouse. Violet even had a temporary crush on him in the mainline series.
Professor de Mousus
The headmaster of Mouseford Academy, Octavius de Mousus is one of the most prominent authority figures on Whale Island.
- Cool Teacher: He's the headmaster of Mouseford Academy and is always looking out for his students. He also keeps close contact with the various alumni of the academy, as proven by his regular correspondence with Thea Stilton.
- Reasonable Authority Figure: As the headmaster, it's his job to make sure that everything at Mouseford runs smoothly, and his students are always welcome to come to his office if they need his help. He also has a no-nonsense attitude when dealing with troublemakers, particularly Ruby.
