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WALLE (Waste Allocation Load Lifter Earth Class)
The title character. WALLE is the only robot of his kind shown to be still functioning on Earth. Although working diligently to fulfill his directive to clean up the garbage, he is distracted by his curiosity, collecting trinkets of interest. One day during work, he meets EVE and his life changes forever.
Voiced by: Ben Burtt
- Absurdly Dedicated Worker: He keeps trying to clean up Earth's surface after all humans have left even though he is the only robot still functioning and no real progress has been made in several hundred years.
- Act of True Love: If his efforts to repair EVE when he thought she was broken weren't this, his devotion to fulfilling EVE's objective, even while he was broken, certainly was. He even refused what could have been his only chance to hold her hand, to retrieve the plant.
- Adorkable: He loves musicals (well, one musical). He collects spoons and forks... and has just started a new collection of sporks.
- All-Loving Hero: Seems genuinely pleased to meet everyone he comes across, human or robot. Or cockroach.
- The Aloner: In the beginning.
- Amazon Chaser: WALLE has a love for EVE, a explorer droid with incredible strength and a powerful blaster to boot.
- Badass Adorable: Especially in the climax when he holds up the holo-detector despite being damaged by Auto's taser.
- Blithe Spirit: Everyone he encounters starts thinking differently as a result of it—maybe because he wakes them up from their trance or because he's so filthy they break their programming to clean him.
- Butt-Monkey: Gets blasted at, crashed into, broken, and tossed into walls regularly.
- Character Signature Song: "Put On Your Sunday Clothes" from Hello, Dolly!, which he always has recorded on his playback.
- Collector of the Strange: He keeps a wide assortment of random trinkets that catch his fancy.
- Critical Annoyance: A low-pitched BEEP BEEP BEEP BEEP plays when he's about to run out of energy.
- Cute Machines: He and EVE are even the page image!
- Desperately Craves Affection: When he meets another actual robot, he's so eager to make contact that he tries to befriend her despite her attempt to blast him.
- Determinator: Did the same job for 700 years, held onto the ship back to the Axiom for no one knows how long simply because EVE was on it, and held up the holo detector even though he had very recently been electrocuted by AUTO and was still recovering from that.
- Dogged Nice Guy: To EVE, initially. He doesn't stop trying to get close to her even though she attempted to blast him and kept ignoring him during their first interactions.
- Eye Beams: WALLE's eyes don't actually shoot lasers, but he does have one hidden in the bridge between them. It's a tool, though, not a weapon, used for cutting large pieces of garbage down to more manageable sizes.
- Friend to Bugs: Until he met EVE, his only companion was his pet cockroach.
- Last of His Kind: All the other WALLE units have shut down. (He scavenges them for replacement parts.)
- Leitmotif: "Put On Your Sunday Clothes" from Hello, Dolly! serves as a symbol of WALLE's emergent personality, and later becomes the rallying anthem of the malfunctioning robots. The absence of this song on WALLE's personal audio recorder is what convinces EVE that he Came Back Wrong.
- Love at First Sight: He falls in love with EVE the first time he sees her. Possibly justified in that EVE is the first living thing he's seen other than cockroaches.
- Masculine Girl, Feminine Boy: Feminine Boy to EVE's Masculine Girl, despite being a garbage robot.
- Nice Guy: Granted, he does troll M-O a bit, but other than that, he is a kind, friendly, loyal, heroic and polite robot.
- Non-Action Guy: He's a garbage bot. The closest thing he would have to an offensive capability is a utility cutting laser, but he never uses it as a weapon.
- Not a Morning Person: He drags himself around like a human needing a cup of coffee, bumping into things and unable to put his treads on until he gets his morning sunshine.
- Official Couple: With EVE.
- Opposites Attract: With EVE.
- The Pig Pen: Not on purpose, but 700 years cleaning up garbage on a deserted wasteland hasn't left him in the best shape.
- Pitbull Dates Puppy: With EVE. WALLE is a small garbage robot with a very sweet and friendly personality, while EVE is an Action Girl with a Hair-Trigger Temper who will most likely shoot at you with her plasma cannon before saying hello.
- Post-Kiss Catatonia: WALLE completely freezes the first time EVE "kisses" him.
- The Power of the Sun: In a sense, since his battery is solar-powered.
- Puppy-Dog Eyes: When they're reset to factory standard, it's highly disturbing. The return to normal is what signals that he's back.
- Robo Romance: With EVE.
- Spanner in the Works: His every action on the Axiom unwittingly results in chaos which in turn leads to the downfall of AUTO's regime.
- Stalker with a Crush: Much nicer than most examples, but the trope still applies. They even brought it up on the Blu-Ray geek track. "He's got stalker charm!"
EVE (Extraterrestrial Vegetation Evaluator)
A sleek robot who WALLE meets during a day at work and has come to Earth looking for something. She moves using antigravity technology and is equipped with scanners, specimen storage and a plasma cannon in her arm, which she is quick to use. WALLE falls in love with her the moment he sees her. Eventually, she warms up to him and falls in love with him as well.
Voiced by: Elissa Knight
- Action Girl: With her arm cannon and a general willingness to rush into a fight.
- Action Girlfriend: Her arrival to Earth changes WALLE's life forever and sets him on an adventure to bring humanity back to their home planet. Since WALLE has no fighting skills, EVE handles the combat with her arm cannon.
- Adam and/or Eve: The first robot WALLE encounters after living alone for so long, and she is meant to find life and get humanity back to Earth.
- Arm Cannon: Her primary weapon. Also her main tool, it seems.
- Badass Adorable: Like WALLE, but more so.
- Catch-Phrase: "Directive."
- Cute Machines: She and WALLE are even the page image!
- Defrosting Ice Queen: At first, she only cares about her directive. She starts defrosting after her frustrations with it make her more tolerant of talking to WALLE.
- It's implied she was sentient from the beginning, but got used to hiding it so that she wouldn't get rebooted. Being around WALLE changed that, so that she was more willing to accept the fact that her intelligence wasn't a "defect".
- Fem Bot: Downplayed, or possibly reduced to basics. EVE's series of robots have large expressive eyes, ovoid bodies, fluting tones and graceful movements. Her 'gender' is mostly a matter of perception.
- Gaussian Girl: Her mostly white body gives her a very soft outline.
- Hair-Trigger Temper: It doesn't take much for her to use her arm cannon on something.
- Hot-Blooded: With that Hair-Trigger Temper of hers and that much determination to complete an objective, she would definitely qualify.
- Killer Rabbit: She may be a cutie but the plasma gun she wields in her arm is anything but harmless.
- Laugh of Love: She has a cute electronic giggle while bonding with WALLE.
- MacGuffin Escort Mission: Her directive is to safely bring plant life from Earth to the Axiom's scanner.
- Masculine Girl, Feminine Boy: Masculine Girl to WALLE's Feminine Boy.
- Meaningful Name: She is named after Eve, the first woman on Earth according to The Bible, because Andrew Stanton thought that WALLE's loneliness reminded him of Adam, before God created his wife.
- Non-Indicative Name: EVE's name suggests that she's supposed to be looking for vegetation anywhere besides Earth, but Terrestrial Vegetation Evaluator would make for a much less catchy nickname.
- Not So Above It All: At WALLE's home, he hands her an egg-beater, and after figuring it out, she spins it so fast that it breaks. She quickly puts the broken remains on the nearest shelf and tries not to draw attention to herself. She even starts to hum something while she waits.
- Official Couple: With WALLE.
- Opposites Attract: With WALLE.
- Pitbull Dates Puppy: EVE is an Action Girl with a Hair-Trigger Temper who will most likely shoot at you with her plasma cannon before saying hello. She eventually falls in love with WALLE, a small garbage robot with a very sweet and friendly personality.
- Robo Romance: With WALLE.
- Single Woman Seeks Good Man: She eventually falls in love with WALLE because of his sweet nature and complete devotion to her.
- Trigger Happy: Responds to any movement by blasting it when she first arrives on Earth.
- Tsundere: She at first appears as short-tempered, intolerant and prone to blowing things up with her plasma cannon at the slightest provocation. Once WALLE becomes closer to her, EVE reveals a caring and affectionate side, even trying to put her directive aside when WALLE is in danger.
- The Unpronounceable: To WALLE.
- Violently Protective Girlfriend: To WALLE eventually. She defends him, carries him around, and rescues him when AUTO's minions start chasing them through the ship.
- Wingding Eyes: All the emotions she goes through throughout the film are expressed entirely through her eyes, which are basically a big dot matrix screen.
- When All You Have Is a Hammer...: Her problem solving tree is something like "blast it with my arm cannon. Does it still need to be blasted more? [Y/N]"
- When She Smiles: When she's happy, she's just as adorably lovable as WALLE.
M-O (Microbe Obliterator)
A tiny, obsessive-compulsive maintenance robot with rollers for hands who keeps Axiom clean. When M-O meets WALLE and sees how filthy he is, he deviates from his normal routine and follows WALLE, cleaning up behind him.
Voiced by: Ben Burtt
- Accidental Hero: Saves WALLE and EVE from getting sucked out into space by accidentally getting himself wedged in the doors when trying to clean WALLE.
- Badass Adorable: He tries to help WALLE, EVE and the rest of the malfunctioning robots get past the Stewards by cleaning them.
- Berserk Button: M-O gets furious when he sees dirt on WALLE to the point that he follows the robot through the ship.
- Butt-Monkey: He's dedicated to his job... no matter how much he's going to need repairs by the end of it...
- Cute Machines: He's a very enthusiastic cleaner.
- Catch-Phrase: "[FOREIGN CONTAMINANT]"
- Determinator: Nothing stops him from finding WALLE and cleaning him.
- Inspector Javert: Come hell or high water, he will ensure the grungy trash compactor will not disrupt the sterile, germ-free environment of the Axiom. A benign example, as he's perfectly friendly to WALLE once he does his job.
- Leave The Two Love Birds Alone: M-O chases away the other robots when WALLE regains his memories and shares a romantic moment with EVE.
- Made of Iron: He might be small, but his body is strong enough to survive getting caught in the Axiom's airlock doors without sustaining any significant damage.
- The Napoleon: Smaller than most of the other robots, but leads the group of cleaner robots.
- Neat Freak: So much so that he breaks his programming to follow WALLE throughout the ship and clean him.
- Spanner in the Works: If he hadn't been so determined to clean WALLE, he wouldn't have gotten caught in the airlock doors. If that didn't happen WALLE, EVE and the plant would've been blasted out the airlock, allowing AUTO to maintain control over the ship and preventing humanity from going back to earth.
- Super OCD: He does not tolerate dirt and would even cut through the other robots' designated paths to clean up WALLE's tracks.
- When All You Have Is a Hammer...: Even when M-O starts helping the heroes, he does this by cleaning, the only thing he can do, even when other things would be more useful.
AUTOAUTO is the autopilot. Shaped like a sailing ship's steering wheel, Auto units assist the ship's captain with his or her duties.
Voiced by: MacinTalk
- A.I. Is a Crapshoot: Inverted; the other robots are going beyond their programming while AUTO is still following his directive.
- Alas, Poor Villain: His shutdown by McCrea is quite tragic since he had little control over his behavior because of a hopeless directive.
- Anti-Mutiny: He is actually following his instructions by defying the Captain.
- Big Bad: The reason why the Axiom hasn't returned to Earth for all of these years is because of Auto's directive.
- Big "NO!": AUTO says one when McCrea turns him off.
- Little "No": AUTO utters this when he notices WALLE trying to hold open the container for the plant, before promptly jamming the button to close the container down so it crushes his adversary.
- Completely Missing the Point: CEO Shelby Forthright gave the order not to return to Earth because it couldn't sustain life. The current Captain points out that that order no longer applies since the plant proves that earth can now sustain life. AUTO's response? "Irrelevant." AUTO was given the order not to return to Earth, and will stay by that order even though the reason it was given has changed.
- The Computer Is Your Friend: He was given orders to safeguard humanity, and he will fulfill those orders whether the humans want him to or not.
- Creepy Monotone: Combined with Evil Sounds Deep.
- Cyber Cyclops: He is one big red eye on a steering wheel.
- Evil Sounds Deep: He has a chilling, robotic baritone.
- Expy: Of HAL 9000.
- Just Following Orders: He has the secret order (Directive A-113) to never return to Earth.
- "MUST FOLLOW MY DIRECTIVE."
- Near-Villain Victory: To the point where it takes several spanners for him to lose. He's so efficient that he succeeded at his directive for 700 years and his actions nearly kill WALLE, the one being responsible for putting him in this position anyway. Again, AUTO would've won if it weren't for a certain cleaning bot.
- Not So Stoic: Begins to panic when WALLE is close to placing the plant in the Holo-Detector, and hits the button to retract it so hard it breaks.
- Obviously Evil: A robot with a glowing red eye identical to that of HAL 9000? Safe to say he's not going to be one of the heroes.
- Oh, Crap!: Towards the end of the film when EVE and WALLE escape from the garbage chute and when the Captain tricks him with the plant backup.
- Red Eye, Take Warning: He has a red eye that deepens his similarity with HAL 9000.
- Shock and Awe: Shocks WALLE with his taser to send him falling down the garbage chute.
- Villainous Breakdown: Starts when EVE and WALLE breaking out of the trash pit. Exacerbated by Captain when he fakes out Auto with the plant backdrop. "Not possible" he says in monotone. Gets even worse when he starts sending significant numbers of Steward bots after EVE and WALLE. Jumps off the slippery slope when he intentionally causes the Axiom to list, sending everyone tumbling about. Climaxes when he's using his taser to jam down the Holo-Detector retract button with excessive force.
- Walking Spoiler: He is first built up as just an auto pilot before A.I. Is a Crapshoot happens. Then he subverts it when he reveals that he has been following orders the whole time.
- Well-Intentioned Extremist: He honestly thinks he is doing good by not going back to Earth.
GO-4 is a small robot who is the leader of the Axiom police robots.
- Disney Villain Death: Suffers a messy one. When Captain McCrea is struggling in a fight with AUTO, GO-4 attempts to help but is instead kicked out the window and is completely smashed upon impact.
- The Dragon: GO-4 is actually working for AUTO, and is the head of the sentry robots.
- Oh, Crap!: When he sees McCrea fighting AUTO.
- The Napoleon: He's small, but fierce.
BURN-E (Basic Utility Repair Nano Engineer)
BURN-E is the robot that is seen repairing the ship when WALLE and EVE fly into the airlock and lock him outside. He's the focus of a short on the DVD with his name.
Voiced by: Angus MacLane
- Absurdly Dedicated Worker: Determined to finish his task of fixing a broken light on the ship, even while the events of the film keep getting in the way.
- Ascended Extra: Gets his own short.
- Butt-Monkey: He's just trying to do his job and fix the ship, but the events of the film keep causing chaos for him.
- The Engineer: It says so right there in his name.
- Lower-Deck Episode: His short shows how his work spans the entire film.
- Mr. Fixit: His job is repairing things around the Axiom.
- "Shaggy Dog" Story: By the time he finally gets it working, the light is destroyed again. And even if it wasn't destroyed, they're back on Earth by that point so it doesn't matter much anymore.
- Rule of Three: It takes him three trips to finally repair the light he's trying to fix.
- Yank the Dog's Chain: Only for the same light to get smashed by an escape-pod door coming down. Just when he had returned power to the light and completed his job.
WALLA (Waste Allocation Load Lifter Axiom Class)
The larger counterpart to WALLE's type, the WALLAs spend their time compacting trash and loading it into Airlocks. While at first they seem to be rigidly following their programming, they're actually gentle giants who have a surprising amount of personality.
- Absurdly Dedicated Worker: Each of the Axiom Class robots follow their protocol to the letter. This nearly leads to WALLE and EVE's demise when they almost get ejected from the airlock. Fortunately, the WALLAs are very attentive to their tasks as well.
- Gentle Giant: While in appearance, they are giant behemoths with very functional design choices, the WALLAs are actually very emotional and kind robots. In the original version of the scene in which they appear, they even look amused after WALLE tries to demonstrate that EVE is in one of their cubes by making a cube of his own, and pat him on the head.
The CEO of Buy n Large as of the exodus from Earth to clean up the rampant trash everywhere.
Played by: Fred Willard
- Air Quotes: He seems fond of these, and a newspaper seen in a Freeze-Frame Bonus even shows him doing this in a press conference.
- Greater-Scope Villain: He was the one who gave AUTO the "never return to Earth" order that caused part of the main conflict later on.
- Punny Name: "Shall be forthright".
- Posthumous Character: The movie takes place nearly 700 years after his enactment of Protocol A-113, so it's safe to assume he's long dead.
- Something Completely Different: Hey Pixar, you got some live-action in your CGI...
- Word of God says this is because Fred Willard is like a cartoon anyway.
- Well-Intentioned Extremist: He put Protocol A-113 into place because Earth's environment had become toxic and he didn't want humans coming back to it.
Captain B. McCrea
The captain of the Axiom. His daily duties are so droll that he doesn't take them seriously... at first.
Voiced by: Jeff Garlin
- Authority Equals Asskicking: He's the highest-ranking (and perhaps only) officer aboard the Axiom, and manages to take down AUTO in hand-to-hand fighting.
- Big Good: He is leading the humans back to Earth, and he is opposed to Auto trying to stop them.
- Brilliant, but Lazy: He's certainly lazy, not even knowing the ship had a jogging track, but when prompted, he was able to wire up the cameras to reactivate in his room and broadcast to the whole ship after AUTO shut them down AND trick AUTO into thinking he had the plant by exploiting AUTO's lack of depth perception.
- Cowardly Lion: He reacts with loud shock whenever he sees something unfamiliar, like a dirty robot from earth, or a voice-activation mic. But he is surprisingly capable in an actual crisis.
- The Captain: "Auto... You are relieved of duty!"
- Crouching Moron, Hidden Badass: He starts as just another blob-person going through mindless routine. The prospect of returning to Earth wakes him up.
- Determinator: "I am the captain of the Axiom! We are going home today!"
- Eye Scream: At the end of the film, he gets poked in the eye by Auto after grabbing the latter.
- No Name Given: His name isn't given in dialogue, he is only called "captain", but you can see his last name and first initial in the captain's portrait.
- Oh, Crap!: When AUTO stages a mutiny.
- Only Sane Man: Seems to be the only human on board that is aware of the ennui of their existence.
- Reasonable Authority Figure: He is a bit strict about protocol and routine, but not when the fate of humanity is at stake.
- Stout Strength: For someone who has literally never gotten any exercise, or even stood up once in his life, he sure has a strong grip!
- Wiki Walk: Goes on one of these after he asks the computer to define 'Earth', eventually ending on 'Dancing' while WALLE and Eve are finishing their dance outside.
One of the passengers aboard the Axiom, and the first human WALLE has probably interacted with on-board. He was entranced by the ennui of life aboard the Axiom before a chance encounter with WALLE.
Voiced by: John Ratzenberger
Another passenger aboard the Axiom, also broken out of her trance by a chance encounter with WALLE.
Voiced by: Kathy Najimy
- Beta Couple: With John.
- Mama Bear: When humanity prepares to return to Earth, Mary notices the panicking, crying babies and reacts in horror. Later, when AUTO tilts the whole ship and sends every passenger careening to its sides, Mary sees the falling babies, screams, "John, get ready to have some kids!" and throws him across the aisle to form a human net to catch them. What makes it even more powerful is that these aren't even her children—she's so much of a Mama Bear that she'll protect anyone's child, not just her own.
- Meaningful Name: John and Mary, huh?
A small brown cockroach, possibly of the family Blattellidae, encountered by WALLE sometime before the beginning of the movie. By the time of the first scene, he and WALLE are inseparable partners. He has no name in the movie, although background material gives him the nickname 'Hal'.
- All Animals Are Dogs: He's loyal, enthusiastic, and knows several tricks, especially 'stay'.
- Art Major Biology: While he's almost photo-realistic in appearance, his behavior is much more appealing than that of normal roaches. The tiny 'boing' sound effects help, too.
- Interspecies Friendship: In a charming, endearing and ever so slightly repulsive way.
- Made of Iron: Like most of his kind, he can take surprising amounts of punishment. WALLE runs over him twice and it doesn't even faze him.
- Punny Name: He's a roach named Hal, a Shout-Out to Hal Roach Studios that produced numerous The Little Rascals and Laurel and Hardy films of the 1920s, 1930s and 1940s.
- Trademark Favorite Food: Twinkies.
- Tuckerization: His name is an homage to HAL, the antagonist of 2001: A Space Odyssey, as well as Hal Roach, an old-time movie and short subject producer of the 1920s to the 1940s.
- The Voiceless: Aside from a few chirping noises.