Revealing the Angel Within

The moment where an antagonist, anti-hero or the character in-between thereby being the complete opposite of the hero revealing his/her villainous nature.

Examples
Although scaring looking, Gigantosaurece was shown to be a true hero and good friend as well as the protector the dinosaur world. Chief starts out as an disobedient dog but warms up. Tempest Shadow starts out evil but then starts to change after being betrayed. Fee reveals the angel within as stays besides and loves her best friend Harvey and brother Foo. The Beast: He started out as a mean, selfish grump, but showed himself as the endearing hero he truly was by sharing his library with Belle, letting her go to her father, and putting Gaston in his place. The Iron Giant: He started out as a figure to be feared, but then revealed the hero within when forming a close bond with Hogarth, saving two boys from falling off a ledge, and sacrificing himself to save Rockwell from a nuclear strike. His portrayal in Ready Player One also adds giving Art3mis an opening to destroy Mechagodzilla, avenging Daito in the process, and getting the rest of the High Five into the IOI fortress before falling into the lava river.

Maui: He reveals the angel within when sacrificing his fishhook to drive back Te Ka and help Moana restore the heart of Te Fiti. Helga Pataki: Reveals the angel within during The Jungle Movie, allowing Arnold to finally see the depth of her hidden feelings towards in.

Judy Hopps: She shows herself as the angel she truly is by helping Nick overcome his prejudice towards prey.

Nick Wilde: Started out as a crafty con man, but after Judy Hopps saved his life, he revealed the angel within when he stood up to Chief Bogo and revealed his tragic backstory. In the end, the two of them worked together to solve the mystery behind the savage attacks and save Zootopia.

Merida: After reflecting on her past mistake and discovering that Mor'du became a monster as result of the same reckless choice, Merida reveals the angel within when she makes amends for her mistake and saves her kingdom, something which Mor'du failed to do.

Garfield: Starts off as a spoiled and selfish cat and bullying Odie from jealousy, but revealing the angel within when he frees Odie from his cage and saves him from Happy Chapman.

Flynn Rider: He reveals the angel within when he sacrifices his life for Rapunzel.

Darkwing Duck: he starts out the series as lone vigilante, but he revealed the angel within after rescuing a little girl named Gosalyn Waddlemeyer from Taurus Bulba's henchmen and brings her to his hideout where they begin to bond. He tells her that before he met her, he didn't have a life worth risking.

Grumpy: He started out as a mean grump, but he revealed the angel within when he warned Snow White not to let anything or anyone in the house and redeemed himself after the princess was revived.

Stitch: He started out as a violent and dangerous alien created by Jumba Jookiba. When he crashed in the Hawaiian Islands on Earth, he remained dangerous and violent, but slowly began to reveal the angel within when he met Lilo and became a member of her family.

Squidward Tentacles: He occasionally revealed angel within him when it comes to aiding SpongeBob and Patrick, though mostly when he sees benefits that he can also gained from such acts.

Lapis Lazuli: She revealed to be not as heartless as she seemed after Steven fixed her gem, and truly revealed angel within her further by tricking Jasper after she attempt to fuse with her to trapped her within ocean, which doesn't last very long that it took maximum efforts for Steven and co. to free her once and for all. She does this further by standing up to Jasper later on.

Syren: After Kylie Griffin reasons with her, she became the compassionate peace-loving spirit she is supposed to be by betraying Banshee, returning the stolen youth, and surrendering herself to the Extreme Ghostbusters.

King Triton: He was strictly overprotective of Ariel due to the death of her mother, fearing he won't lose her to human hands, but he showed himself as the loving father he truly was when sacrificing his soul to Ursula to save his daughter and letting her go in the end.

Enfys Nest: Initially acts like a cruel terrorist but later reveal herself to actually be a freedom fighter who wanted to use the coaxium for good.

Old Man Marley: He started out as an intimidating figure who Kevin feared, but he revealed his true colors when he attacked Harry and Marv to save the boy.

Mutant Toys: They revealed angel within by helping Buzz and Woody, revealed that their horrific looks were actually not so successful attempt to fix themselves after surviving Sid's abuse along with fixing Buzz.

Peridot: She revealed angel within by standing up against Yellow Diamond and insulting her due to seeing how much of a compassion-less fraud she is.

Lars Barriga: He revealed angel within after being revived with Steven's tears and allowing Steven to return to Earth on his own.

Iago: He ultimately revealed angel within him where he redeemed himself by betrayed Genie Jafar.

Cindy Vortex: She started as bully for Jimmy, but overtime, she had change of heart and her relationship with Jimmy improves.

Wreck-It Ralph: He may be a grumpy monster on the outside, but is actually gentle inside and his antagonism were part of his job and programming in game he lived. In fact, he struggles to prove that he had angel within him, resulting adventures that allowed him befriended with Vanellope, gained respect with everyone in his game origin, and indirectly expose King Candy as Turbo.

Jack Skellington: He wanted to bring Christmas cheer to the world his own way, but after realizing that his reckless actions ruined the holidays, he revealed the angel within when he rescued Santa Claus and Sally from Oogie Boogie, made amends for his wrongdoings, and let Santa go back so he can set things right.

Shrek: He started out as a grumpy ogre, due to his rejection, but overcame his heartlessness by saving Princess Fiona and allowing himself to connect to others. In addition, his adventures in Far Far Away led to him becoming a loving husband and father.

Stay Puft: Born a Destructor form for Gozer, Stay Puft evolved into a separate entity and came to view the Ghostbusters as his friends, getting angry when The Phantom stole their Proton Packs.

Kerchak: His problem with Tarzan was due to him too wary with his species (human), but after the latter defeated Sabor, he slowly revealed the angel within, particularly when helping him free his fellow gorillas.

Anakin Skywalker: He revealed angel within when he throws Emperor Darth Sidious into the reactor shaft in order to save his son, Luke, which also led to his redemption and the return of the jedi.

Owen Shaw: He revealed angel within to help his brother Deckard rescue Dom's son from Cipher after he was used as a pawn.

Cyberwarp: Was a member of a Decepticon cell posing as Autobots, yet was the only one who believed non-violent methods to resolving the conflict between Cybertronians could exist. She turned on Cyclonus, Skyjack, Treadshock, and Riotgear while in their combined form Galvatronus, allowing the Autobot combiner Ultra Bee to defeat Galvatronus.

Branch: Started out being grumpy and unfriendly to Princess Poppy after his grandmother was captured and killed by the Bergens, but revealed the angel within when he helped Poppy and brought peace to the land.

Kuzco: At the start of the film, Kuzco was spoiled and selfish, but his adventures with Pacha helped the arrogant emperor open up his heart.

Homer Simpson:

Deckard Shaw: He revealed the angel within when he helps Dominic Toretto and his crew, rescue Dom's baby also stop Cipher for starting World War III.

Hitch: Reveals the angel within when he helps Sunny and other non-earth pony friends bring the magic back to Equestria.

Ashi: Born one of seven high-trained assassins possessing the same powers as Aku, Ashi came to see the lies her master and mother have fed her through Samurai Jack. In return, she helped Jack resume his quest to return to the past.

Mamá Imelda:

Manny:

Diego: Started out as a follower of the wicked Soto, but revealed the angel within when he took his friends' side and protected Manny from Soto's pack.

Bart Simpson:

The Ghostly Trio:

Megamind: Started out as a super villain, but overcame his lust for power when saving Metro City from the evil Tighten and winning the heart of Roxanne Ritchi.

Queen Elinor: She started out being strict and overbearing, especially to her daughter, but showed herself as the compassionate mother she truly was when rescuing Merida from the dreaded Mor'du and reconnecting with her offspring.

Batman (The Lego Movie Series): Like Garfield, he was a spoiled, haughty and selfish jerk and he wouldn't listen to Barbara Gordon, Alfred Pennyworth, or anyone else. However, he showed himself as the selfless hero he truly was when rescuing his friends from the Phantom Zone exiles and save Gotham City together, which also helped him learn how to form connections with other people like his family and friends.

Jared Grace: Starts off being rude, disrespectful, and easily irritated due to his parents' divorce, but his adventures in the fairy realm lead him to transform into a courageous hero when he keeps Arthur Spiderwick's field guide safe, defeats the evil Mulgarath, and reconnects with his broken family.

Gru: Starts off as a greedy supervillain who plots to obtain the moon and when Margo, Edith and Agnes come into his life, he initially plans on using them to steal a shrink ray. But as the film progresses, Gru ends up growing to love the girls and reveals the angel within after rescuing them from Vector, admitting that giving them up was wrong, and developing compassion.

Brutaka: Started off of betraying the Order of Mata Nui in his quest for power, but later realized his mistakes and joined back the Order after regaining his redemption.

Eddie Valiant:

RJ

Verne

Alex the lion

King Scrawl: Starts off terrorizing Color City and building the dam with boulders to plug Colorfall and block the color source to make the Color City crayons fade, but overcame his greed and revealed his truly handsome, brave, friendly, kind, sweet, loyal, virtuous and heroic nature by saving Yellow from getting eaten by The Great Waste and fighting him because he's no monster, he's just an unfinished drawing king who wants a mouth and some color.


 * Tilly Green reveals her true identity as a family friend for all of the Loud Rabbit family members and reveals her true nature beforehand by seeing Cricket's true nasty nature and, witnessing the anarchy occurred, realizes that he is really Dark Mayhem thereby defecting from the Villain League's allegiance. She further reveals her true nature by helping exonerate Felix after inadvertently framing him for being a virus that removes the victim’s higher functions.
 * Colonel Greene Jr reveals his true colors by defecting to the side of the Myles Bots.
 * Drake Parker reveals his true colors by taking up the role as Pipsqueak upon joining forces with the team.
 * Josh Nichols reveals his true colors by fighting against Langer's empire.
 * The Resistance have their moments of revealing their true nature such as:
 * Ono II (also known as Zachary Delightful) reveals his true nature by going from a bratty jerk to a heroic adventurer and superhero who becomes a high-level criminal. He further reveals himself after he is revealed to be the true Ono with the Ono known throughout the series turning out to be the malicious and deceitful founder of the Grizzly Empire. When he is betrayed and targeted by an alternate Perry the Platypus (when Perry thinks “Doofenshmirtz” (really Zachary) is betraying him and is back to his evil roots), he ultimately reveals himself for the selfless and intelligent akuma he really is and shows his true natural white hair to the city and then complete his transformation upon being attacked by Perry’s army.
 * Jane Triggers reveals herself as anything but her father when she chooses to betray him and by extension all of the United States Government’s Linden City Branch and side with the Resistance to expose the mastermind behind the witch hunting.
 * Pipsqueak (unlike his prime counterpart) is revealed to be a laid-back hamster and a male one at that who only survived the massacre because he was doing nothing and was away from the chaos while choosing to side with the Resistance in hopes of embracing his true calling as a “raccoon”.
 * Rex Dangervest reveals the angel within once he sees that his actions are merely just manipulations orchestrated by Stef and the overarching Colonel Stanford Triggers.
 * Tim reveals his true nature when he discovers Bob’s death and sides with the Resistance to avenge the banana-obsessed minion’s demise and help exonerate them.
 * King Trollex (formerly Drake Starling) reveals his true nature when he betrays the Villain League and defiantly stands up to the Villain League’s bodyguards. When he falls victim to Akumageddon as a result of his betrayal, he defects to the Resistance and eventually becomes a member.
 * Luke Skywalker reveals the angel within upon seeing his fear for the future devastate the city and make Zachary a public criminal and helps found the Resistance in the fight against the mastermind behind Linden City’s escalating murders.
 * Forky reveals his true nature when he lets go of his delusions and happily embraces his purpose as a toy ultimately joining the Resistance and killing Max Steel to save Squidward’s life.
 * Hulk reveals his true nature when he starts seeing his scary appearance as a cure rather than a disease and researches ways to fuse Bruce Banner and Hulk while trying to protect the city without his fellow Avengers.
 * Cottontail reveals the angel within when it is learned that Super President Kickbutt and Cottontail are one and the same. She pushes this further when she realizes that the T-Force have become animals and have lost their sapience thus she chooses to find the perpetrators and avenge the T-Force’s downfall.
 * Randy Harris reveals his true self when he sees that he was never really meant to be a heavy metal rock star, realizes the rock powers’ true colors and learns that he is meant to be whoever he wants to be and not was expected of a man like him thus he decides to avoid setting a bad example for Zachary and sides with Nick Persons to form a revolt against the tyrannical Stanford Triggers.
 * Nick Persons reveals the angel within when he feels guilty for buying off a kid’s love and making said kid cry and decides to learn better thus betraying his status as a drug dealer and Dora’s pawn and siding with Randy to rebel against Triggers’ tyranny.
 * Twitch reveals his true nature when he sees the chaos and madness that was created because of Lotso’s gang so he becomes a Resistance agent when he wounds up the last Toy Story 3 character left.
 * Snoopy reveals his true colors when he defects to the Resistance’s early stages and pays with his life twice only to be resurrected and become a new member.
 * Dora Marquez reveals her true nature when she sees that being a villain isn’t worth people getting killed and redeems herself thus being ungrounded for life and defects to the Resistance after being turned into a zombie.