This is a list of characters from the Disney/Pixar media franchise Monsters, Inc., including the 2001 film Monsters, Inc., the 2013 film Monsters University, and the 2021 Disney+ series Monsters at Work.
Appearing in both films James P. Sullivan
James Patrick "Sulley" Sullivan is a furry, cyan-and-purple-spotted monster with a humanoid bear face, short devilish horns, dark blue eyebrows, and a cat-like nose. He has muscular limbs, a reptilian tail, dorsal spikes, and feline fangs, and is capable of ferocious roaring. He excels at scaring children but is genial and sweet-natured.
Monsters University depicts a younger Sulley as a gifted but arrogant student, whose father Bill had made a name for himself as a scarer. While attempting to capture a school pet, he meets Mike Wazowski. What begins as a rivalry between the two monsters becomes a friendship that endures after they both got disgracefully expelled from the school.
In Monsters, Inc., he is named the best scarer at the company, and following the events of the film, he leads the company's restructuring of utilizing laughs instead of screams to harvest energy. By the end of the film, he and Mike are named the company's joint chief executive officers.
In Monsters at Work, he retains the title.
Mike Wazowski
Mike Wazowski (voiced by Billy Crystal in the film series, shorts, and the Disney+ series, Carlos Alazraqui in the video games, merchandise, attractions, and commercials and Noah Johnston as his younger self) is a green one-eyed monster with a round body, two small horns, and thin arms. He has four fingers on each hand and three toes on each foot. Wazowski is depicted as diligent and intelligent, but also competitive, wise-cracking and stubborn.
During a childhood field trip to the energy company Monsters, Inc., Mike becomes inspired to become a professional scarer. He gets accepted into the Monsters University scare program years later, where he meets both James P. "Sulley" Sullivan and Randall "Randy" Boggs. Mike grows jealousy towards Sulley for his cocky personality and slacker attitude, but expresses a liking for Randall, his roommate. After failing one of the classes in the scaring program, Mike works out a deal with the Dean to re-enroll in the program on the stipulation that he wins the Scare Games, a competitive series of scare-based challenges. To participate, he joins the unpopular fraternity Oozma Kappa, which is later joined by Sulley, who also failed the class. Mike and Sulley begin to form a friendship as they compete in the games. During the final event, Sulley cheats on Mike's behalf. Frustrated with Sulley's lack of faith in him, Mike breaks into a door-lab to enter the human world in an attempt to find out if human children find him scary, which they do not.
Although Sulley rescues him, the incident results in both Sulley and Mike's expulsion from the school. The two apply as workers in the Monsters, Inc. mailroom. They advance through the ranks until Sulley becomes a scarer with Mike as his assistant.
In Monsters, Inc., Sulley and Mike operate a station on the titular factory's Scare Floor, where they successfully generate energy with Sulley's scaring ability. Mike is in a romantic relationship with Celia Mae at this time. Throughout the film, Mike helps Sulley in his newfound mission to rescue Boo, a human child who sneaks into the factory.
While Sulley bonds with Boo, Mike is initially more inclined to find any means of getting rid of her. Meanwhile, Randall, who is no longer on good terms with either of them, is concocting a plot to generate more energy using the Scream Extractor, a machine that requires the kidnapping of human children. Amidst the chaos resulting from Boo's unknown presence, he discovers that Mike knows information about her, and they both agree to return her to a designated location. Upon arriving there, mentioning Randall's involvement makes Sulley hesitant, and while trying to disprove his suspicion, Mike gets abducted by Randall and uncover of his plan. Following several further plot events, Sulley and Mike successfully return Boo home, expel Randall to the human world, and prove the orchestration of the scheme by Mr. Waternoose, the company's CEO, to Child Detection Agency (CDA) Agents.
Mike is portrayed as a comedian in Tomorrowland at the Magic Kingdom in Walt Disney World Resort attraction, Monsters, Inc. Laugh Floor. He has made cameo appearances in other Pixar films, such as Finding Nemo (2003) and Cars (2006).
By the events of Monsters at Work, he is serving as Monsters, Inc's co-CEO, and educates monsters on how to improve their humor.
Randall Boggs
Randall Boggs is a purple, eight-legged, reptilian monster who can change his skin color to blend in with his surroundings. He is Sulley's arch-rival and Mike's nemesis and former close friend.
In the prequel Monsters University, Randall enrolls at the same time as Mike and the two end up as friends and roommates. He is neurotic and timid at first, having difficulty controlling his camouflage abilities, but is a model bookworm. When Randall is accepted into Roar Omega Roar, the top fraternity in the university, he quickly abandons Mike in order to retain his standing with the fraternity. He becomes more confident, determined, and vicious. After an embarrassing loss to Sulley at the Scare Games, a furious Randall vows he will never be beaten by Sulley again.
In Monsters, Inc., he vies for the position as the area's top scream collector, a competition set up to encourage working. Randall and his assistant Jeff Fungus collaborate with Waternoose to save the company by kidnapping human children to solve the crisis and allow Randall to rise to a higher position, but also secretly planning to betray Waternoose and take over the company. Sometime after Randall had finished building the Scream Extractor, Randall leaves a door activated on the Scare Floor, and a human child (later named Boo) wanders out. After discovering that she is in the factory and learning that Sulley and Mike were involved, he makes a deal with Mike: he will bring Boo's door to his station during lunch, where they will be able to return Boo, but he secretly hides in Boo's room waiting to capture her. When a suspicious Sulley refuses to trust Randall's plan, Mike goes into the room instead to prove Sulley wrong, leading Randall to abduct Mike by mistake. He nevertheless decides to use Mike as a test subject for the machine, but Sulley rescues him and Fungus is put in front of the machine instead and is disfigured as a result. He is soon revealed to have Waternoose as his partner, who banishes Sulley and Mike to the Himalayas to ensure that they cannot interfere with their plan and expose it to the public. Before Randall could extract the scream from Boo, Sulley returns and destroys the machine (using it to pin Waternoose, Randall, and Fungus to the wall, but Randall was quick enough to dodge it), thus saving Boo. Randall attempts to stop Sulley's escape but is heroically thwarted by Mike. After a long chase through the doors in the factory's door storage facility, Boo eventually conquers her fear of Randall and stops him from pushing Sulley out of an open door, buying Sulley enough time to overpower him. Afterward, Randall is forcibly exiled to the human world and winds up in a mobile home where the inhabitants beat him senseless, thinking he is an alligator. Sulley and Mike then destroy the door to prevent Randall's return. Later, Waternoose is exposed and arrested for his crimes, while Fungus learns from his mistakes and forms a working relationship with Mike and Sulley.
In Kingdom Hearts III, which takes place sometime after the film, Vanitas repairs Randall's door, which allowed him to return. He plans on harnessing negative energy to have kids become permanently sad. After he creates an Unversed monster with the help of Vanitas, he hopes to bring down Sulley and Mike and take over as CEO of Monsters, Inc. a defeated Randall forced back through his door in disgrace, followed by Sora locking the door, causing it to disappear.
In Monsters at Work, it is revealed that Johnny Worthington from FearCo rescued Randall from the swamp and hired him as an inside man to sabotage Monsters, Inc. to make laugh power seem unreliable and have Monstropolis run on fear power forever. Randall was also the one responsible for framing Tylor for the missing items and vandalism. He attempts to stop MIFT from extracting the screams from FearCo's fake scream amplifier and gets close to it by destroying the plug, but his tail gets caught in the socket, powering up the extractor and saving Monstropolis. He and Johnny are arrested for their cover-up, but Randall escapes from his cell using his camouflage.
Roz Roz (voiced by Bob Peterson) is a snail-like monster who is the key master and administrator of Scare Floor F. Near the end of the film, she is revealed to be Number One of the CDA Agents, having been on an undercover assignment to investigate the company and expose Randall and Waternoose's scheme. She appears briefly near the end of the prequel as a member of the CDA Agents squad that responds to the break-in at the Door Lab, although she wears a full-body protective suit that covers her face. She reappears in the first episode of Monsters at Work, informing Mike and Sulley that the board of directors were putting them in charge of Monsters, Inc. and that her old undercover job was being given to her sister Roze. It is revealed in the season finale that she also works for the Monstropolis Energy Regulatory Commission.
CDA Agents CDA Agents are an assortment of different monsters in hazmat suits (variously voiced by Rodger Bumpass, Pete Docter, Bill Farmer, Teddy Newton, David Silverman, and Lee Unkrich) whose main job is to respond to any reported incidents of contact between monsters and children or their belongings, since it is believed that human objects are toxic. They isolate and destroy any items accidentally brought back into the monster world. Any monsters that come in contact with a human object are quickly and forcibly decontaminated and get a neck cone applied afterwards. They also appear to have law enforcement powers, as they arrest CEO Henry J. Waternoose III after his plot to kidnap children to forcibly extract their screams is uncovered.
Yeti The Yeti (voiced by John Ratzenberger) is a white-furred monster from Monstropolis who got banished to the Himalayas in the human world. He is a friendly monster and an expert at making snow cones. The Abominable Snowman greets Sulley and Mike when Mr. Waternoose banish them to the Himalayas. While the Abominable Snowman tries to make Sulley and Mike feel at home in his abode, he understands Sulley must rescue Boo, and tells him of a Nepalese village at the foot of the mountain where they can regain access to the monster world. Despite everything, the Abominable Snowman seems to have made the most of his fate and genuinely seems to enjoy the human world.
In the end credits in Cars (2006), the Abominable Snowplow, based on him, makes a cameo appearance.
In Monsters University, he was shown to have worked as a mailroom supervisor at Monsters, Inc. He warns Mike and Sulley not to tamper with the mail which is a crime punishable by banishment.
In Monsters at Work, it is revealed that he was banished by Mr. Waternoose after stumbling across a letter detailing the Scream Extractor plot. Due to this Sulley invites him back to Monsters, Inc., and he agrees. Once that was done, the Abominable Snowman happily works as a snow cone salesman at Monsters, Inc. under the new name of Adorable.
Appearing in Monsters, Inc. Boo