Guilt and Remorse

When a hero makes a tragic mistake or realizes what the cause and effect of his or her actions, the hero feels guilty. The hero would feel guilty for quite some time until figuring out how to set things right and make amends.

Harry Potter

 * Albus Dumbeldore feels guilty for letting his lust of power take control of him, leading him to fight against his friend, Aberforth and his friend, Gellert Grindelwald during an argument. This duel lead to Albus's younger sister, Ariana to be killed by accident, causing Albus's relationship with his brother to be shattered. Dumbeldore would carry this guilt for the rest of his life before his death in 1997.
 * Severus Snape feels guilty for causing Lily Potter's death as he informed Voldemort about the prophecy, leading him to target the Potter family.

Animated Films

 * The Grinch (2018) feel guilty for stealing Christmas and admit why he did it, because of his past. He also apologized to Cindy Lou Who for ruining her Christmas and didn't mean it after he sadly went home
 * Lightning McQueen feels guilty for hurting Mater's feeling as he blamed the latter for causing him to lose the Tokyo race. Mater, on the other hand, feels guilty for causing McQueen to lose the race and later becomes even more guilty once he realizes how silly his behavior is and for how he placed McQueen in danger.
 * Alex, Marty, Gloria, and Melman start feeling guilty after they lied to their new circus friends.
 * Judy Hopps feels guilty for ruining her friendship with Nick Wilde and causing a citywide panic of racism in Zootopia.
 * Batman (The Lego Movie series) fells guilty in the Phantom Zone when Phyllis shows him how his selfishness has cause more problems, from breaking Joker's heart to his mistreatment towards Dick Grayson and Alfred. He is later horrified when Robin, desperate to save Alfred and Barbara from Joker's army, decides to go down Batman's path as "Nightwing".
 * Sebastian feels guilty for spilling the beans to King Triton about Ariel rescuing Eric which lead to an tense argument between King Triton and Ariel in her grotto, resulting the former to destroy Ariel's human treasures. King Triton, on the other hand, feels guilty for his drastic actions towards Ariel by destroying her grotto with his trident, where he believes it lead to her disappearance from Atlantica.
 * Shrek feels guilty for signing the contract with Rumpelstiltskin, which erases all of his history.
 * Beast feels guilty for scaring away Belle from the castle after he finds her in the West Wing near the Enchanted Rose. Later, he feels guilty for Belle's father Maurice getting cold and sick in the woods, prompting him to release Belle to help her father.
 * Wreck-it Ralph feels guilty for causing his game to be placed "out of order" and for breaking Vanellope's heart and chance of happiness.
 * Tarzan feels guilty for leading Clayton to the gorillas' nests thus allowing him to be able to capture the gorilla.
 * Simba feels guilty for his father's death which he blames himself for.
 * Flora, Fauna and Merryweather feel guilty for leaving Princess Aurora alone in her room allowing Maleficent to trick her to prick her finger on a spindle of a spinning wheel.
 * Mr. Potato Head feels guilty for throwing Woody out of the moving van, believing he was trying to get rid of RC, not realizing he was trying to save Buzz Lightyear from Scud and Andy Davis already misses Woody.
 * Tempest Shadow felt guilty for bringing Twilight Sparkle to the Storm King whom take over Equestria, before Tempest became remorseful and befriends with Twilight afterward.
 * Violet feels guilty for bullying Maya, her Team Poppy, and the meadow bugs while cheats the Honey Games. She apologized to Maya for framing and abusing her while she meets her for the first time which it supposed to become friends.
 * Emmet Brickowski feels guilty about Wedding Temple.
 * lady feels guilty shortly after she sends tramp away.
 * Mickey feels guilty for yelling at Pluto when he sees an empty doghouse.

Live-Actions Films

 * James Gordon feels guilty for lying to the people about Harvey Dent and Batman, who saved his son from being killed by Dent and is taking the blame for Harvey's crimes.
 * Walter Hobbs begins to feel guilty for harshly disowning Buddy out of his life by yelling at him.
 * George Wilson feels guilty for saying mean and hurtful things to Dennis Mitchell and telling him that he doesn't want to see him or know him.
 * Inspector Gadget feels guilty for not listening to Penny about the bowling shoe that one of Claw's men dropped at the Science Convention after discovering that Penny was right all along.
 * E.B. feels guilty about being selfish.

Television

 * Nancy Wheeler feels guilty for her best friend, Barbara Holland's death as the last thing she said to her was to go home.
 * Rick Grimes feels guilty for the deaths of his good, dear friends.
 * Squidward feels guilty for destroying SpongeBob and Patrick's friendship and plans to fix it up in order for them to stop bickering.
 * Twilight Sparkle felt guilty for being yelled at by Flurry Heart.
 * Zuko feels remorse and guilt for betraying his Uncle Iroh and later feels remorse for committing so many crimes in the past.
 * Mr. and Mrs. Turner feel guilty for not listening to their son, Timmy about Vicky after discovering that Timmy was right about Vicky being an evil babysitter.
 * Steven Universe feels guilty for entering Homeworld and letting the Gems get poofed.
 * The loud sisters feel guilty for having Lincoln get punished with no cereal.
 * the rest of the main six feel guilty when queen chrysalis scolds them for not believing twilight.
 * the fruit cart gang feel guilty sending orange away after realizing cutesy is worse than he was.
 * patrick, sandy and mr krabs feel guilty when they read spongebobs letter.

Quotes
"(After kicking SpongeBob out of his house for wrecking the bass, Squidward enters his bathroom) Yech! That was disgusting! I feel like I need to scrub myself. (He opens up the curtain and screams after he sees Patrick in his tub) (Patrick: Hey, buddy. I warmed it up for ya.) Patrick! Get out! And put some clothes on! (SpongeBob peeks in through the upstairs window) (SpongeBob: What's the matter, Squidward, old buddy? (He notices Patrick in the bath-tub) Oh, ho-ho! So this is what I find, huh?! My best friend and my ex-best friend and... rubber bath toys!) (Patrick, simultaneously: Oh, yeah?! Well, he was my friend first!) (SpongeBob, simultaneously: You're just a backbiting, backstabbing silly blob of...) (Squidward screams since he can't take this anymore) This can't be happening to me! (He runs away from the bathroom. SpongeBob and Patrick stop their arguing as they notice Squidward's gone) (SpongeBob and Patrick: Squidward!) (SpongeBob: Buddy!) (Patrick: Squidward, where are you?!) (SpongeBob: Where'd ya go, friend?) (Patrick: Where are ya, ol' buddy?) (Outside his house, Squidward had hidden in his trashcan, now feeling remorseful for what he did to SpongeBob and Patrick's friendship) Oh, this is nuts! I need a plan to get those two back together and outta my hair!"

- Squidward Tentacles feeling guilty for destroying SpongeBob and Patrick's friendship and plans to fix it up in order for them to stop bickering.

"Young Shen was in line to rule Gongmen City... but he wanted more. I foretold that someone would stand in his way... a panda. But I never could have foretold what came next..."

- Soothsayer explaining to Po her guilt and agony of telling Shen the prophecy that he would be defeated by a "black and white" warrior, indirectly making her responsible for Shen's massacring the village of innocent pandas.

"My God, Bones. What have I done? (McCoy: What you had to do. What you always do. Turn death into a fighting chance to live.)"

- James T. Kirk feels guilty after the Enterprise self-destructs.

"(Steven and Connie are unfused after failing to escape as Stevonnie.) (Connie Maheswaran: You okay? (Steven nods his head.) Well, good thing I grabbed a couple of these before the ball. Otherwise, we'd have nothing to eat. Can't escape Gem Prison on an empty stomach.) (Connie eats her bar and gives a piece to Steven and Steven realized his tragic mistake.) We never should've come here. (Connie stops eating.) (Connie Maheswaran: What?) This whole plan. What was I even thinking? (Connie Maheswaran: Well, you were thinking that if you came to Homeworld and talked to White Diamond, maybe you could save all the corrupted gems on Earth.) Oh right, and look where that got. (Connie Maheswaran: Oh well, we knew it wouldn't be easy.) Yeah. But, I didn't think I'd get every Crystal Gem poofed at the same time. And what will dad say when he finds out? His only son, in jail at fourteen. What a disgrace. (Connie Maheswaran: We can't give up, one step at a time. We'll think of something. Okay, so we tried the bubble and the shields in that window. What else have we got? (Connie discovers that she still has her phone.) Hey, my phone. Oh wait, no reception.)"

- Steven Universe feeling guilty for entering Homeworld and letting the Gems get poofed.

"(Mr. and Mrs. Turner have arrived at the parking lot of the Dimmadelphia Cafe.) (Mrs. Turner, looking at watch: It's 6:45. Where's Deep Toot?) (Mr. Turner giggles about the name until Mrs. Turner gives him a concerned look. Deep Toot arrives and the Turner Parents get out of the car.) (Mrs. Turner: Are you Deep Toot?) (Mr. Turner continues giggling, but stops) (Deep Toot: Yes I am. Your babysitter, Vicky. [slides the photo book of the evidence that Vicky has done] She's meaner than you know.) (Mrs. Turner picks up the book, and she and Mr. Turner look at the photos.) (Deep Toot: The vase, the picture, the piano. Vicky ruined them all and blamed Timmy.) (Mr. Turner, shocked: Hey, she's key scratching "Vicky was here" on my car. I punished Timmy for key scratching "Vicky was here" on my car. Why would she do that?) (Deep Toot: Some say it's to make parents say kids are horrible. They hire her more often.) (Mr. Turner: Leaping leg-holes. She's using my underwear to clog the toilet.) (Mrs. Turner: And I punished Timmy for that, by making him eat chocolate. Which in retrospect is it a very good punishment after all.) (Mr. Turner: Unless it's that reindeer chocolate.) (Deep Toot: Some say, me I think because she is evil. I think she's icky, icky with a V.) (The Turner Parents have discovered, for the first time, they have learned that their son, Timmy was right about Vicky.) (Mr. Turner: Wait a minute, Chip Skylark's hit song "Icky Vicky" suddenly makes sense!) (Mrs. Turner: Oh my gosh! Timmy was right. Vicky is terrible. Oh, Deep Toot, how can we ever thank- [pauses upon noticing that Deep Toot has disappeared without a trace]) (Mr. and Mrs. Turner have finally realized their mistake.) (Mr. Turner: She's gone!) (Mrs. Turner: We should've listened to Timmy!) (Mr. Turner: You have to tell him your sorry and wherever he is, wherever he's hiding, we know one thing for sure.) (Both: He's watching television! [head back into the car]) (Mr. Turner: [continues giggling] Deep Toot. [laughs] Oh, man. Oh, that kills me! Who was that girl, anyway?) (Mrs. Turner: I don't know, but she left this. [takes out the note that Deep Toot had left them before she disappeared] "I am not Vicky's sister.") (Both: Hmmm...) (Mr. and Mrs. Turner become suspicious about the note from Deep Toot.)"

- Mr. and Mrs. Turner feel guilty for not listening to their son, Timmy about Vicky after discovering that Timmy was right about Vicky being an evil babysitter.

"The bowling shoe. Penny was right. I should've listened to her. She tried to tell me, and I didn't listen to her."

- Inspector Gadget feels guilty for not listening to Penny about the bowling shoe that one of Claw's men dropped at the Science Convention after discovering that Penny was right all along.