For characters introduced in the original 2001 film, see the Monsters, Inc. page.
For characters introduced in the 2021 series, see the Monsters at Work page.
A middle-aged student and the founding member of Oozma Kappa fraternity.
- Back to School: Don has joined Oozma Kappa after he was downsized from his sales department. Averted in that none of his humour is about his age, rather than that he's still sticking with his well-polished sales persona and patter in a fraternity environment. This is itself averted in the final act when it's revealed that he's engaged to his fraternity President's mother; and will now be his big brother as well as a stepfather.
- Cool Old Guy: He's a friendly, cheerful guy and welcomes Mike and Sulley into the frat with hot cocoa. He also beats Reggie Jacobs during the Scare Test segment of the Scare Games.
- Digging Yourself Deeper: See That Came Out Wrong below.
- Intergenerational Friendship: Is friends with the other members of Oozma Kappa despite being old enough to be their dad. Actually becomes literal for Squishy when Don decides to marry Sheri.
- Nice Guy: Don is fatherly, accepting, gentle, and kind.
- Non-Mammalian Hair: Sort of. His "thinning hair" and mustache look like fins, much like many other students on campus.
- Team Dad: Starts out as one for Oozma Kappa and later on becomes one in a more literal sense for Squishy by getting engaged to his mom.
- That Came Out Wrong: His attempt at making Squishy feel less awkward about him becoming Squishy's stepfather.Don: Just think of me as your big brother that's marrying your mother... wait. We're brothers that share the same mom/wife. (beat) That's worse.
- Wall Crawl: Don eventually learns to do this by utilizing the suction cups on his arms. He makes effective use of it during the last few rounds of the Scare Games.
Two-headed monster with one eye on each head, four arms, and tentacles for legs.
- Conjoined Twins: They both have different personalities, appearances and voices but share the same body. Sadly for Mike, the Greek Council counts bodies, not heads.
- Cyclops: Both of them, individually
- Deadpan Snarker: Terry, in his and Terri's introduction scene.Terry: Hi, I'm Terry with a "y".
Terri: And I'm Terri with an "i"! I'm a dance major!
Terry: (laughs) And I'm not.
- A Degree in Useless: Terri is a dance major. But Terry doesn't cooperate.
- Foolish Sibling, Responsible Sibling: Terri is foolish while Terry is responsible.
- Gender-Blender Name: Terri is presumably male, but has a girl's name.
- Hidden Depths: The serious and cynical Terry can perform close-up magic.
- Humanoid Abomination: Both briefly make a shadow silhouette that resembles one during the final event in the Scare Games.
- Identical Twin ID Tag: Terri has a single straight upright horn, like an "I", while Terry has two slightly curved downward horns, like a "Y". Also, Terry is taller.
- Japanese Beetle Brothers: It probably wasn't intentional on the creators' part, but they fit the pattern perfectly.
- Multiple Head Case: Mike tries to exploit it by passing them off as two members but Brock doesn't buy it. Lampshaded:Brock: Sorry, boss. We count bodies, not heads. That dude counts as one.
- Nice Guy: In spite of their opposing personalities, both twins are well mannered and polite, and have deep, brotherly love for each other.
- Polar Opposite Twins: Terry is calm, cynical, and intellectual, while Terri is energetic, optimistic, and theatrical.
A five-eyed jelly monster whose mother owns the fraternity house.
- Alliterative Name: Scott Sebastian Squibblesnote . Also applies when using his nickname.
- Always Someone Better: It's not that evident at first, but he could count as this to Mike. Though conventionally cuter and shorter than Mike, he ends up becoming an on-field Scarer. This is to demonstrate that it wasn't exactly height and appearance that doomed Mike's dreams.
- Amazingly Embarrassing Parents: His mom, Sheri Squibbles.
- Chekhov's Skill: His tendency to sneak up on people early in the film serves as Foreshadowing, as he uses it to his advantage during the Scare Games.
- Disappeared Dad: Don later marries Sheri. Probably means his biological father left the picture a while ago.
- Establishing Character Moment: When introducing himself, he unintentionally startles Sulley, then rather childishly climbs into a rocking chair.
- Extra Eyes: He has five eyes.
- Jump Scare: His tactic used in the final event of the Scare Games when an unsuspecting dummy turns around and finds him creepily staring at it.
- Keet: He is a very energetic and excitable little fellow. He can still be stealthy when he wants to be.
- Manchild: While still living with his mom isn't that odd for many college-age students, him never staying up late and making wishes on ladybugs makes him rather childlike in an endearing way.
- Meaningful Rename: Somewhere after the end of the movie, his nickname got changed from "Squishy" to "Scary", as shown on his Scare Card during the credits.
- Momma's Boy: Much to his embarrassment. He still lives with his mother who dotes on him, even in front of his friends.
- Nice Guy: Squishy is kind and sweet.
- Offscreen Teleportation: Later uses this to his advantage in the scare simulator challenge of the Scare Games. Overlaps with Stealth Hi/Bye. He never uses the stealthy exit, but hot damn he's got the "Stealth Hi" part down.
- Running Gag: Squishy repeatedly shows up from out of nowhere. Acts as a sort of Chekhov's Skill later in the Scare Games.Mike: We need to get you a bell.
- Stealth Expert: His natural skill is being unnervingly stealthy, which allows him to excel as a Scarer.
A purple furry monster with an arch shape and a questionable background.
- Cloud Cuckoolander: His appearance alone confuses the hell out of people.
- A Degree in Useless: He's studying New Age Philosophy.
- Having a Heart: "I have an extra toe. Not with me, of course."
- Mysterious Past: "The ultimate free spirit, Art is a mysterious monster with a questionable background."
- Never Going Back to Prison: When spotted by security in the Scare Factory, he completely freaks out at the thought of any legal punishment and screams that he can't go back to prison.
- New-Age Retro Hippie: He fits the mold quite perfectly. He studies "New Age Philosophy" and is overall quite the Cloudcuckoolander and Plucky Comic Relief.
- Nice Guy: He has a good heart, but rather oblivious for the most part.
- Noodle Incident: Whatever got him in jail before.
- Only One Name: He is only ever referred to as "Art". Not even in the promotional material is he given any other names.
- Plucky Comic Relief: His main purpose in the movie is to provide humor with his hippie personality.
Roar Omega RoarA preppy fraternity comprised only of the cream of the crop in scare students, Roar Omega Roar has won the Scare Games several years running. Sulley was a member with them at the start of the semester until getting thrown out of the Scare Program. Randall Boggs becomes a member of the group for the Scare Games in the film.
The confident President of Roar Omega Roar who is Mike Wazowski's rival.
- The Ace: Much like Sulley, Johnny is a naturally gifted scarer, though it's implied that he lacks Sulley's initial tendency to slack off and used his past studies to perfect his talent and become a legitimate high-achiever. As a result, he's regarded as the top scarer in the entire university, which further verifies his Villain with Good Publicity status.
- Climax Boss: The movie builds up to Johnny and Mikes eventual face-off towards the end of the movie. However, the movie doesn't end even after Mike defeats Johnny as it was revealed that Sully tampered with the machine to make it easier for Mike to scare it and Mike eventually stumbling off into the human world.
- Expy: Basically Bradley Uppercrust III from An Extremely Goofy Movie if he were a monster.
- Everyone Has Standards: While Sulley's family heritage initially gets him in Johnny's good graces, Johnny soon becomes frustrated with Sulley's failing grades and his nonchalance towards them. He warns Sulley before the end-of-semester exam that his natural talent and the famous Sullivan name alone aren't enough without academic success.
- Faux Affably Evil: Not "evil", but jerkish. Any chumminess he displays only serves to underline how slimy he really is.
- Follow in My Footsteps: Never brought up in the movie proper, but in an interview with his voice actor, Nathan Fillion, he reveals that he sees Johnny as having been pushed by his father into becoming a high-achiever. Supported in the official artbook, where it's stated that Johnny is deathly afraid of failure.
- Graceful Loser: Possibly. While he never interacts with OK after losing to them, even though he constantly underestimated and belittled them leading to that point, he gets over the shock of their victory fairly quickly and doesn't seem to hold a grudge. He even congratulates and tries to invite Sulley to rejoin his fraternity after their defeat from OK.
- Hidden Depths: For much of the movie, his general reaction towards Oozma Kappa has been of disdain, scorn, and smug dismissal of them. However, at the end, when facing off against Mike for their scaring round, he speaks surprisingly frankly and without any of the usual pomp in his voice when he tells Mike that he shouldn't feel embarrassed if he fails, given that he was never meant to be here anyways.
- High Collar of Doom: Well, Popped Collar of Jerkishness anyway.
- Horned Humanoid: He has an humanoid monster appearance but has two big horns on his head.
- Jerkass Has a Point:
Johnny: It's time to start delivering on that Sullivan name.
- While kicking Sulley out of the fraternity is harsh, Johnny is completely justified in his assessment that Sulley is mooching off his successful family's legacy and not putting in the effort he needs to succeed on his own merits.
Mike: Tell them! That guy's a jerk! He's all wrong!Sulley: You're right. He's a jerk...but I'm not so sure he's wrong.
- An unpleasant take where in spite of his brutal jerkishness, he is ultimately right that Oozma Kappa lack the traditional Scarer traits. This does leads to Oozma Kappa learning to become resourceful about their own seemingly benign traits to become Scarers. Lampshaded by Sulley in a deleted scene:
- Jerk Jock: A monster version of the trope, but it's clear that he is the popular guy on campus who is thought as cool by everyone. Yet, he values academic performance as well as sports prowess.
- Jerk With A Heart Of Jerk: The only reason he invited Oozma Kappa to the fraternity party during the Scare Games was to humiliate them, not to congratulate them.
- The Nicknamer: Examples include "Killer", "Big Blue", "Bruiser", and "Grandpa". He also latches onto "Sulley" immediately when he's told that's his current conversation partner's preferred address. Which says a lot when you consider that Randall is just "Boggs" to him.
- Obviously Evil: His rather devilish appearance should be a big hint that he's not a nice guy.
- Opposing Sports Team: The closest thing the movie has to a main antagonist.
- Preppy Name: Not only he has a quite fancy family name that also shows him to be the third member with that name.
- The Rival: Serves as Mike's main one in the movie. They even face off against each other in the final round of the Scare Games.
- Running on All Fours: Johnny is occasionally seen running on all fours during some of the Scare Games, such as the Simulated Scare challenge.
- Smug Smiler: He usually has a big prideful grin on his face.
- Smug Snake: As great as he is at scaring, he is too overconfident on his skills and doesn't think Mike can compare to him.
- Top-Heavy Guy: The lower half of his body is much smaller than his upper half.
- Villain with Good Publicity: As Mike's arch-rival and the ringleader on the effort to humiliate Oozma Kappa, he is loved and respected by pretty much everyone in the university. But then again, who could blame him? Being the president of the top fraternity in the most prestigious university in the monster world and all.
A one-eyed crab monster that serves as the Vice President of Roar Omega Roar.
- Ambiguously Gay: He is seen often following Johnny than most members of the fraternity and when Johnny gets a high score during the last challenge of the Scare Games, he yells at him "Johnny, you're my hero" in a way that a straight person would surely not yell to a friend when congratulating him.
- Cyclops: Another one-eyed monster in the series.
- The Dragon: To Worthington.
- Giant Enemy Crab: He's not the biggest of the RORs, but he is much bigger than most normal crabs, and is an antagonist for Mike, Sulley, and the other Oozmas.
- Nice Job Fixing It, Villain: If Chet hadn't casually mentioned to Mike after he and the rest of Roar Omega Roar humiliated them at a party that they weren't cut out "for the big leagues", Mike wouldn't have gotten the idea to take Sulley and the rest of the Oozma Kappa members to Monsters Inc. to cheer them up, show them that all kinds of monsters are scarers, and thus provide them the encouragement they needed to proceed forward in the Scare Games.
- Red Baron: We see in the credits that he is known as "The Scream".
- Speech Impediment: Speaks with a noticeable lisp.
An insect-like monster with four arms and pink eyes.
- Big Creepy-Crawlies: He is a tall monster with several bug-like qualities.
- Extra Eyes: Four eyes to be exact.
- Multi-Armed and Dangerous: They're especially useful when it comes to playing ping-pong.
- Spikes of Villainy: He has spikes adorning his head and is one of Johnny’s followers.
- Technicolor Eyes: Javier rather uniquely has pink sclerae instead of white.
A dark green monster with three eyes and grass-like hair all over his body.
- The Brute: Johnny even refers to him as "Bruiser" when he lines up in the last round.
- Extra Eyes: He has three eyes.
- The Klutz: He stumbles a bit during his turn in the Scare Simulator, affecting his score badly.
- Technicolor Eyes: Like Javier, Reggie has uncommon yellow sclerae instead of the more common white.
- The Voiceless: Reggie grunts and growls a lot at Don but never speaks a proper word.
A purple monster with two horns and vampire fangs who roars like a Wookiee.
President of the Greek Council and announcer of the Scare Games.
- Cute Monster Girl: She looks kind of cute for a monster with three eyes.
- The Eeyore: Played with. She says discouraging words to Mike so he won't participate into Scare Games while she's also announcing Scare Games to Mike and many other students. This is opposed to what her partner Brock's doing, in which he says encouraging words instead. However, it's pretty much likely a case of Jerkass Has a Point, that Mike isn't scary, just like many other monsters have said.
- Extra Eyes: Has three eyes.
- Non-Mammalian Hair: Like Don, her hair looks more like fish fins or webs.
- Not So Stoic: After being half-asleep while commentating through most of the Scare Games, she goes ballisticly happy when Oozma Kappa wins the final event.
- One-Steve Limit: Averted. Mike had a girl in his kindergarten class named Claire as shown in the prologue for the movie.
- Red Oni, Blue Oni: The blue to Brock's red.
- Savvy Guy, Energetic Girl: Inverted. She's the Savvy Girl to Brock's Energetic Guy.
- Ship Tease: With Brock Pearson.
The Greek Council's Vice-President and co-announcer for the Scare Games.
- Character Catchphrase: "THE SCARE GAMES!!!"
- '80s Hair: He has feathers on his head styled like a mullet.
- Feathered Fiend: Downplayed. He's a bird monster, but other than the fact that he's supposed to be scary, he's a pretty nice guy.
- Jagged Mouth: More like jagged beak.
- Large-Ham Announcer: He's one of the announcers for the Scare Games and he speaks in loud, dramatic tones.
- Lovable Jock: While he's definitely a yeller, he's nice enough to give encouraging words to Mike before he signs up for the Scare Games.
- Mix-and-Match Critters: He looks like a giant purple chicken with the horns of a gazelle.
- No Indoor Voice: Inverted temporarily during one of the Scare Games events inside a library. Once the Oozma Kappa members make noise, though, he goes back to his normal level.
- Red Oni, Blue Oni: The red to Claire's blue.
- Savvy Guy, Energetic Girl: Inverted. He's the Energetic Guy to Claire's Savvy Girl.
- Ship Tease: With Claire Wheeler.
- Top-Heavy Guy: His feet and waist are pretty small.
A three-eyed pink monster with red hair who is the fearless President of Python Nu Kappa.
- Alpha Bitch: Implied. While she has very little characterizations, she's the closest example you can get in this universe.
- Brainless Beauty: As attractive as she and her team look for monsters, they do not seem terribly smart in the "Don’t Scare the Teen" challenge judging by how they all scare humans who are clearly teenagers.
- Cute Monster Girl: Carrie and the rest of her team have more attractive traits than other monsters, including some of the female ones we see.
- Establishing Character Moment: Carrie and PNK are introduced being wished good luck by Terry. Carrie responds in a cheery voice, "Thanks! We're going to rip you to pieces!", then flashes her Nightmare Face.
- Evil Redhead: to the very least, she is more than likely to be evil to human children, just like many other monsters in this universe. Also, see Manipulative Bitch below.
- Extra Eyes: Three.
- Inexplicably Identical Individuals: All the PNK girls look identical, despite not being biologically related.
- Manipulative Bitch: Possibly. OK would not have been aware of the party at ROR if Carrie and PNK hadn't told them about it, and OK attending the party ultimately results in them falling victim to a particularly cruel joke from the RORs. While not explicitly stated, some fans believe that the rest of Frat Row knew about the prank from the start, which would mean that Carrie and her sorority deliberately led OK into the trap.
- Nightmare Face: In a second, she can reveal red eyes and a mouth full of sharp teeth.
- Palette Swap: As mentioned above, all the PNK girls look physically identical. They can only be told apart by their skin color, hair color, and outfit color.
- Red Eyes, Take Warning: Can shoot fire out of them, too.
- Shoot Everything That Moves: What screws her team over during the "Don't Scare the Teen Event". Participants are only supposed to scare young children.
- Succubi and Incubi: She and the rest of the PNK sorority resemble succubi. Even more prevalent in their visual development artwork.
A slug student who attempts to get to all his classes.
- Brick Joke: Shows up after the credits as he finally makes it to his classroom, which is empty.
- Butt-Monkey: Is late to his first day of class, by two whole semesters. He now works at Monsters Inc, and he still takes so long to get to places. He took a whole night to complete his approach for his bowling team.
- Eye on a Stalk: He is a slug monster with eyes like this.
- Goofy Buckteeth: He is a gag character with buck teeth.
- No Name Given: Stands out for being one of the few characters in the movie not to be named, not even in extended material.
- Offscreen Inertia: He moves as fast as he can to get to class in time on the first day. The Stinger shows that he missed an entire school year due to being so slow.
The dean of the School of Scaring.
- Armor-Piercing Question: Hardscrabble gives one regarding Mike that Sulley (despite starting to warm up to Mike) can't give a straight answer to.Hardscrabble: Do you think he's scary?
- Berserk Button: Surprisingly subverted. When her record-breaking scream canister is introduced, and summarily knocked over and broken, it seems as though Hardscrabble is about to enter Dissonant Serenity mode and hardly call out Mike and Sulley. But she doesn't. She's disappointed, but she never so much as raises her voice. Having said that, she does give both Mike and Sulley a "The Reason You Suck" Speech, instead of giving them a fair go in the scare simulator.
- Big Entrance: She loves doing this trope. Anytime she's shown flying into the scene, everyone noticeably becomes nervous and on edge. In particular, her introductory scene leaves absolutely no room for discussion about her qualifications as a Scarer.
- Cool Old Lady: She's a Stern Teacher and Retired Badass, after all.
- Creepy Centipedes: Her bottom half.
- Dean Bitterman: She gets better.
- Establishing Character Moment: Hardscrabble's first scene has her swoop into the classroom, pull down all the curtains and make the room very dark, stand by her bust and trophy to show her earned credentials, and give a stern lecture about how she expects only great things and anyone substandard will fail.
- Expy: A bit of a Distaff Counterpart to Anton Ego from Ratatouille.
- According to an interview, Hardscrabble takes much inspiration from Maleficent. The artists even gave her Maleficent-style horns at one point in development, but ultimately decided that this was going too far.
- Giant Flyer: Not humongous, but big enough to qualify.
- Good Is Not Nice: Hardscrabble has no respect for students she sees as "mediocre"... but once you prove you're great, she'll be the first to tell you so.
- Jerkass Has a Point: She and all other doubters are later proven undeniably right in telling Mike he's not scary. In addition, when she dresses down Mike and Sulley, both fail her hypothetical scenarios, Mike for the above reasons, and Sulley because he doesn't use his head when scaring, implying both Mike and Sulley only sped up their inevitable failure in the school.
- She has fair reason to despise Mike and Sulley for breaking her canister and notably aims her disdain directly toward them rather than the rest of Oozma Kappa.
- Her extremely demanding requirements for being a scaring major also make sense in-universe. Being a scarer, according to everything the monster world understands, is incredibly dangerous. You don't want incompetents going into what is treated as an extremely dangerous environment.
- Not only dangerous for the scarers themselves, but, as she informs Sulley, a botched scaring expedition could literally lead to the end of civilization if the humans discover the Monster World.
- Kick the Dog: Although she stays rather reasonable in her strictness, she's not immune to those moments and even gently taunts Mike after Oozma Kappa's near-loss in the first round. Granted, her grudge against him is understandable, but her flaw is that her criticisms are more unpleasant than helpful.
- Large and in Charge: Towers over most of the other monsters. She can appear even larger by opening her wings and using her centipede half to gain height.
- Living Legend: She is the current holder of the All-Time Scare Record.
- Meaningful Name: "Hardscrabble" means "involving hard work or struggle." The Dean herself has no respect for monsters who are mediocre, lazy, or not using their talents to their fullest potential.
- Mix-and-Match Critters: A centipede-dragon-humanoid hybrid.
- Non-Standard Character Design: Downplayed, but her darker colors and more striking design certainly stand out compared to the cartoony and colorful looking monsters making up Monsters University.
- Not So Stoic: She's the sternest, strictest, and most unflappable monster in the school. But when Mike and Sulley create a scream of such power that it not only activates a door from the human side, but fills up every scream canister in the laboratory until they and the door explode, she goes into wide-eyed shock. Later, as she bids them good luck in their future endeavors, she informs that she believes in them because they did the one thing she thought was impossible: surprising her.
- Obviously Evil: Come on, she's basically a black and red centipede/dragon hyrbid. Subverted though.
- Our Dragons Are Different: She has some dragon-like qualities, at least, including her reptilian facial features, horns and batlike wings.
- Pet the Dog: While Mike and Sully are still expelled at the end, she lets the other Oozma Kappa members into the Scare Program after being impressed by how they did in the Games.
- Retired Badass: She retired from her Scarer life to become the School of Scaring's dean.
- Sink or Swim Mentor: If you can't take the heat, leave her school.
- Stern Teacher: She's more harsh than actually cruel and offers words of encouragement to Mike and Sulley as they leave MU.
- Tough Love: This may be an interpretation of her behavior towards her students. As she says in her introductory scene, she doesn’t want to make her students "less mediocre", but as great as they can possibly be.
- Tranquil Fury: When Mike and Sulley accidentally knock over and break her record making scare canister. Hardscrabble is surprisingly rather calm about it, stating it was fine as long as no one got hurt. Mike lampshades this... at least before she gives her impromptu tests to the two.
- Winged Humanoid: For a given definition of "humanoid".
The teacher of Scaring 101.
- Cool Old Guy: Just like Hardscrabble, he's a Stern Teacher and Retired Badass, after all.
- Expy: Looks like a small Uragaan from Monster Hunter.
- Favouritism Flip-Flop: Downplayed. He initially seems most impressed with Sulley's natural scaring talent, but when Sulley's apathy towards studying causes his grades to suffer throughout the semester, Professor Knight gradually shifts his favouritism towards Mike instead. However, he sincerely congratulates Sulley for the improvement that he showed during the Scare Games, and says he looks forward to seeing him back in class.Professor Knight: One frightening face does not a monster make, Mr. Sullivan.
- Non-Mammalian Hair: His blunt spines on the top of his head resemble hair.
- Retired Badass: Not quite as much as Hardscrabble, but his Scare Card shown during the credits appears rather old in comparison to all the others, showing that he was a very successful Scarer before becoming a teacher.
- Stern Teacher: He gives off a strong no-nonsense vibe at first, but he is genuinely very impressed over Mike's efforts and diligence.
The teacher for Scream Can Design 101.
- Big Ol' Eyebrows: So big, they cover his eyes.
- The Bore: Brandywine's lecture on scream can design is deadly dull from the word "go". His bored-sounding monotonous voice and his less than motivating words do not help this situation.
- Creepy Monotone: Not creepy per-se, just very droll and disinterested sounding.
- Gag Nose: His noise looks like it would be on a Sesame Street character.
- Go, Ye Heroes, Go and Die: He's not exactly the best at motivating his students on the first day of class.Brandywine: Some say scream canister design is dull, a waste of a monster's potential. [conspicuously long pause] Open your textbooks to Chapter 3.
- Reused Character Design: According to the official artbook, his character model is the same as Don Carlton's but with yellow fur.
An elderly female monster that works at the library at Monsters University.
- All There in the Manual: The promotional tie-in Monsters University Fearbook reveals that her name is "Margaret Gesner".
- Almighty Janitor: A terrifying giant octopus monster that... looks after a library?
- Berserk Button: Don't make the slightest noise in the library when she's around.
- Blind Without 'Em: An example that's actually played realistically.
- Cold Ham: She is very dramatic, and yet she never seems to raise the tone of her voice.
- Disproportionate Retribution: To anyone who makes a noise in her library, as shown when Bile steps on a creaky floorboard (which was completely out of his control). She quickly grabs him and throws him out the skylight, showcasing what the participants of the games were in for if they were caught.
- Expy: The Librarian's appearance and behavior takes inspiration from Ursula.
- Eye on a Stalk: Her eyeballs are on stalks that give her a slug-like appearance.
- Hypocrite: Despite despising noise in her library, the Librarian's rampages end up causing far more noise than the offending monsters ever would.
- Mix-and-Match Critters: She's a slug and octopus hybrid.
- Multi-Armed and Dangerous: She has multiple tentacles to make her move around the library with ease and grab anyone who disrupts the peace.
- Power Echoes: Her voice has a reverberating growl underscoring it that makes her even more menacing.
- Scary Librarian: Perhaps the scariest librarian around. She provides this tropes page image.
- Tentacled Terror: The lower half of her body is a giant octopus, and she can be quite terrifying with her tentacles.
- Tranquil Fury: "I said QUIET."
A monster who is the mother of Scott Squibbles. She also owns the Oozma Kappa fraternity house.
- Alliterative Name: Sherri Squibbles.
- Amazingly Embarrassing Parents: She first appears in the middle of the OK initiation ceremony to do the laundry. Very loudly.
- Cool Old Lady: She enjoys listening to heavy metal and this short shows that she's very talented at Hacky Sack. And there's her demonstration of "door-jamming" in Party Central...
- Laugh of Love: When Don accidentally hugs Sheri and tries to get his tentacles unstuck, she giggles as she introduces herself, and they eventually get married.
A superstar Scarer on Scare Floor D at Monsters, Inc. who inspires Mike to want to be a Scarer.
- The Ace: Considered a superstar among Scarers.
- Friend to All Children: Frank is the only one of the Scarers at MI that actually stopped to talk to Mike's class when they were visiting. He even gives Mike his trademark MU cap as a gift.
- Small Role, Big Impact: He only appears in the opening scene, but he leaves a huge impact on Mike and inspires him to pursue Scaring as a career. Mike's scaring style is greatly influenced by Frank's — for example, the technique of waking a child up by slowly scratching your claws against the bedpost.
A scarer at Monsters Inc. who later becomes a jokester in Monsters At Work.