Mulan shows off her cleverness and resourcefulness to the viewers when she fashions a means of getting her dog to feed the chickens so she still has time to change her clothes. Soon afterward, she reveals a lack of grace during a meeting with the matchmaker, suggesting that life as a trophy wife will not properly fulfill her destiny.
The Emperor, when told his armies will protect him, immediately declared that the armies should go out and protect his people, showing that he is a wise ruler and cares about everybody who lives underneath his rule.
Shifu from Kung Fu Panda effortlessly evades all his students' attacks during a training session and then rebukes them for "doing well if they were trying to disappoint [him]."
Po's first scene is in the dream sequence which begins the film. He is imagining himself as a respected warrior, establishing his admiration for kung fu. Later after he wakes up, another establishing character moment he has showcases his awkwardness when his kung fu moves attract the attention of a pig villager.
The Incredibles has Dash using his speed to pull pranks on his teachers. Violet turning invisible and shyly looking at her crush as he walked by.
The first minute or so of the movie also sets up a nice Subversion for Bob, Helen, and Lucius. Bob expresses a desire to settle down and Helen says she cant get enough of the superhero gig, veiwpoints that the both do a complete 180 on once the main story has actually started. Lucius is portrayed at first to be a womanizer who doesn't like to get intimate, but is shown to have a wife later on in the movie. Bob and Helen's are justified almost entirely by their decommissioning; Helen prefers to focus on the present and the future, which at this point is dedicated to taking care of her family; Bob, easily distracted Chronic Hero Syndrome sufferer that he is, feels unappreciated and useless when he's not performing heroics. His non-superpowered attempts to be helpful are unappreciated and resented by others, usually due to technicalities.
Sally's is more subtle. In her first few seconds onscreen she is shown doing what she will spend the rest of the movie doing: gazing lovingly at Jack and rebelling against her mad scientist creator/father figure.
The Mayor gets an ECM as well, albeit a little ways into the story, when he goes to Jack's house for advice and panics when he finds Jack has disappeared. This is the first time we see him wear his secondface.
Oogie Boogie's reputation precedes him as the most malevolent resident of Halloween Town, but his first few seconds on screen (even though only his shadow is shown) make his creepiness, evil intentions, and love of gambling very clear.
Aladdin: Aladdin shows himself to not only be an affable thief, but a guy who's soft enough to give bread away to children. The "One Jump Ahead" song tells you absolutely everything you need to know about the guy in a catchy two-minute package.
The later reprise after giving away the bread also reveals his more vulnerable side and that being called a street rat really does bother him, and this insecurity eventually leads to further conflict in the movie.
The Genie enters in a fantastic shower of Magic, lets out a magnificent yell, and then has this to say: "TEN THOUSAND YEARS will give you such a crick in the neck!" Establishing him as something of a goofball Large Ham.
Gothel from Tangled is shown discovering a magical flower that could heal people from any disease, including aging. Instead of sharing it, she hoards this flower for hundreds of years, using it for her selfish gain of remaining young.
She gets another one, showcasing her skill at subtle emotional abuse in one of her earliest lines:
Rapunzel, look in this mirror. You know what I see? A vibrant, confident, beautiful young lady. Oh look! You're here too! Ahahahahah!Oh darling- I'm just teasing!
Gru from Despicable Me is shown to be Affably Evil as he makes a balloon for a crying boy only to pop it and when he goes into a coffee shop, he freezes everyone around him so he could be first in line but tips the cashier before he leaves (though he doesn't actually pay for the coffee or muffin).
Miss Hattie firmly establishes herself as a Bitch in Sheep's Clothing when she cheerily greets the girls. But as soon as Agnes ask if anyone has come to adopt them, she brutally tells them "Hmm, let me think ... NO!"
Scar from The Lion King is introduced "playing" with a helpless mouse he is about to devour while skipping out on his nephew's birth ceremony. When Zazu reprimands Scar (causing him to lose the mouse) he immediately tries to eat Zazu.
Simba has two. The first one is when he's a cub and his love for adventure, impatience and admiration for his father Mufasa are showcased with him being the first one awake on Pride Rock and attempting to wake the older lion up. The second one comes in as an adult when he's happily stargazing with Timon and Pumbaa, only to sadly wander away when they laugh at the idea of "the great kings of the past" looking down from the stars. This personality as an adult shows that while he's found comfort with a new father figure and uncle figure in Timon and Pumbaa, he's still secretly traumatized from having seen Mufasa die and been blamed for the crime by the real culprit, Scar.
Timon and Pumbaa have one showcasing their fun-loving comic relief personalities as they laugh about chasing vultures away from the unconscious Simba. Pumbaa's straightforward kind heart is shown when he immediately wants to take Simba home with them, while Timon is established as a Jerk With A Heart of Gold when he wants to leave the half-dead cub behind out of fear, only changes his mind when Pumbaa points out that having a lion to protect them would be useful, and takes the credit for that realization.
Prince Naveen gets a wordless one: his very first scene has him ripping off his royal decor, grabbing a ukelele, and disregarding his manservant and any royal pomp as he joins a street band, complete with immediate posse of fawning ladies. It easily establishes him as an impulsive ladies' man completely dedicated to enjoying himself.
The film's Big Bad Dr. Falicier gets one too; He's a street corner fortune teller who gives a spell to restore a bald man's hair- which soon covers the rest of his body. This establishes the doctor as a man out to use other people's needs to profit and screw them over. And that Living Shadow shows he's NOT just a Snake Oil Salesman...
Spoiled rich girl Charlotte gets a delayed one. When Charlotte finds Tiana sitting amid the ruins of the beignets with which Charlotte had hoped to seduce the Prince, she might have bawled Tiana out and demanded the beignets be replaced. Instead, she abandons the Prince and takes Tiana upstairs to get her cleaned up and into a fresh costume.
The Wonderlanders in Alice in Wonderland each get a moment to show just how crazy they all are; the White Rabbit frets over how late he is, the Doorknob expresses irritation at Alice waking him up and goes on a tangent of making terrible door related puns, the Dodo sings about being a sailor and displays a method of drying off that makes no sense, the Caterpillar yells "Who are you" at Alice, the Cheshire Cat trolls her, the Mad Hatter, the March Hare and the Dormouse have an "unbirthday" party and the Queen of Hearts sentences her own guards to beheading for painting her roses red.
Ralph in Wreck-It Ralph declares he doesn't want to be a Bad Guy anymore to his fellow video game villains, but then he proves to the audience that he's not a bad guy... by giving his Pac-Man fruit to some recently unplugged characters.
Frollo's moment comes after he's chased down the Gypsy Woman, and in the struggle to relieve her of her "stolen goods", caused her death. Now he realizes that the bundle in her arms was actually an infant, and a deformed one at that. So what's the right thing to do? Why, drop the kid in the nearest well and justify everything! Only the threat of eternal damnation can shake him.
Phoebus is established as a snarky smartass with a good heart who doesn't hesitate to do the right thing when he witnesses Esmeralda being unfairly persecuted by Frollo's men and helps her get away. Even before he sees Esmeralda for the first time, he puts coins in the Gypsies' hat, even though Gypsies have been established as social outcasts, showcasing that Phoebus is charitable to the less fortunate, pretty girl or not.
Obviously Esmeralda's biggest moment in the film is her rescue of Quasi from the crowd, then straight up defiance of Frollo when he tries to forbid her from doing so, giving him a world class "The Reason You Suck" Speech while she's at it. But before all of that, she has a minor moment when Quasimodo crashes into her tent while she's dressing. She could've screamed, yelled at him for being clumsy, gotten angry. But what does she say? "Are you all right? You're not hurt, are you?"
We first see Hiro when he competes in a battle bots arena, where after he drops his noob façade, he is shown to be very cocky and confident when in combat. There's also the fact that he had the guts to hustle in an illegal bot fight, showcasing both Anti-Hero tendencies and his recklessness.
"Hey, I'm as surprised as you are. Beginner's luck."
Tadashi demonstrates his Big Brother Instinct when he jumps in to rescue Hiro from angry bot fighters and later encouraged Hiro to do something productive with his intelligence.
Baymax’s first inflation in the film— from stepping out of his charging case, walking very slowly across the room, very gently moving a stool out of his path and matter-of-factly scanning Hiro and administering bacitracin-based antiseptic. Not only does it cement him as a slow and careful caregiver, but a completely literal minded machine.
Baymax: "I cannot be sick. I am a robot."
Hiro is admiring the zero resistance technology used on GoGo's bike, when she says...
GoGo: Zero resistance. Faster bike. But not fast enough... (flips wheel into recycling bin full of its kind) ...yet.
Wasabi’s perfectly clean and ultra-organized table of tools. He even has a coffee mug that measures portions!
Honey Lemon kisses Hiro on the cheeks before demonstrating chemical-metal embrittlement to him.
Fred casually introduces himself while in a fish monster costume, and also reveals that he's asked his friends to use their scientific knowledge to give him superpowers (namely, to turn into a monster) and an invisible sandwich.
The third movie My Little Pony: Equestria Girls – Friendship Games starts with Sunset Shimmer rushing to help with an emergency, then making her frustration clear when the emergency isn't actually as serious as all that. She's still a good person, but (or "and") now she has her old confidence back.
The Emperor's New Groove — after a How We Got Here moment showing that it won't last — begins with Emperor Kuzco dancing through his castle in a huge musical number about how great he is, which is only briefly interrupted by having an old man thrown out a window for bumping into him and throwing off his "groove".
Having established that guy as our protagonist, his advisor, Yzma, is quickly established as being even worse as she sits on his throne, tuning out a pitiful little peasant whose voice bears more than a passing resemblance to Piglet:
Yzma: It is no concern of mine whether or not your family has... what was it, again?
Peasant: Um... food...
Yzma: Ha! You should've thought of that before you became peasants!
As as a child, we see Judy being passionate about being a cop and standing up to a bully despite the risk to her safety. Despite losing the fight and getting beaten up badly, she manages to steal back the stolen tickets, showing she is capable of thinking quick on her feet.
Nick Wilde is introduced abusing Judy's trust by pretending to be a father and then being a successful conman/businessman, cleverly making profits wheeling and dealing across the city while staying within the law so that Judy can't arrest him. He then shows his cynicism by viciously deconstructing her "small town girl in the big city" backstory, her aspirations to be a cop (including the startlingly accurate prediction that she'll fail, resign, and return home to farm carrots), and the idea that Zootopia is an egalitarian paradise for all animals.
Storks: Junior is introduced as the widely popular Ace who masks his disappointment with quick talk and strained casualness. Tulip is first seen as she prepares to help herself and her flightless bird friends achieve their dreams of flying with untested jet-packs, neatly summing up her reckless and altruistic personality.
Sing establishes several of the main characters, introducing their situations before the plot starts.
Buster is someone who deeply loves theater and remains optimistic despite the sorry state his theater has become.
Rosita is a stay-home mom who enjoys singing but her husband and children are either too young or busy to appreciate it.
Mike is a street musician who has a short temper and bullies a passing monkey to giving him more money.
Ash is a talented singer who is constantly put down by her pushy boyfriend.
Meena has a lovely singing voice but is terribly shy and passive.
Johnny quietly sings to himself while waiting awkwardly for his dad and his gang to return from their latest heist.
The Land Before Time: Ducky's personality for being curious bordering on getting in danger is established the moment she hatches out of her egg. She tries to crawl into the mouth of a giant turtle, only to be saved at the last minute by her mother. Cera has one too when she hatches out of her egg, showcasing her fearless but brash attitude. Petrie has one when Littlefoot is finding something to eat, and when the young Apatosaurus pulls down a branch, Petrie falls off the branch screaming, showcasing his Lovable Coward personality. Lastly, Spike has one as soon as he hatches from his egg and Ducky finds him. Spike immmediately eats the grass that surrounded the egg he hatched from.