Yuka Amino from Blood-C, the 28 year old woman who wanted to become the governor of Tokyo. Although Yuka herself doesn't actually kill anyone personally, she still willingly went along with the massacre of the village and showed no qualms about it to get what she wants. She gets her wish, becomes governor, and nothing bad happens to her at all. The fact that she indeed does a good job ahead of government also helps.
An example from the 2003 Fullmetal Alchemist anime series was General Hakuro. A corrupt man whose men possibly gang-raped Rose after she was sent under his custody, you just know from the scene where he captures her that he would be the type of creep who might do it himself. When the dictatorship is overthrown, we aren't shown if Hakuro even got his. We can assume he did, but we are not shown him get comeuppance.
Envy in the 2003 anime. Despite starting the Ishvalan civil war, beating Ed to a pulp multiple times (and eventually brutally killing him and Major Hughes, one of the series' most sympathetic characters) and being an all-round sordid Jerk Ass Envy gets a relatively happy ending. After 400 years of doing whatever he wants, punting countless puppies, he more or less gets off scot free. I mean, sure he dies but it happens while his life's greatest wish is being fulfilled, so it couldn't be considered comeuppance by any standard.
Dakki from Houshin Engi devoured human beings for seemingly no reason, stopped someone from being executed just to build a burning pillar to use on said person, invites people to parties and then sics tigers on them, turned a guy's son into hamburger and had said guy eat it (the guy later starved to death), and in general made things miserable for the inhabitants of Ancient China. But the worst she did was plot with a godlike entity who's been manipulating the history of the Earth for centuries in order to serve her own interests. What happens to her? she takes control of the body of said godlike entity and uses it to become the Great Mother and merge with the Earth. Talk about Karma.
The Necks of Orochi from Kannazuki no Miko... is a subversion. After having their plot to destroy the world foiled (also, a couple of massacres early on), just get revived and live on as if nothing had happened. Seemed that way, until it's revealed that the universe resets itself so Orochi and Chikane never existed, and without Orochi, the tragedies that would spur them into becoming Necks and committing all those horrible plots never happened and they become better people (Miyako and Girochi never lost faith after the war, or the war never occurred; Corona was able to grow into a successful idol on her own; Reiko's type of favorite stories found success so she didn't have to write dark stories just to survive; Nekoko was treated fairly rather than being a guinea pig... and Tsubasa and Souma's parents aren't THAT abusive now so they led a fairer life.)
Griffith from Berserk sacrificed his hand-picked military unit he had ever since he was a teenager, raped his best friend's love interest in front of him (this after said best friend went out of his way to rescue Griffith from a dungeon he was rotting in for over a year) and his reward at the end of it all was to become a literal God. After that, he rebuilt the Band of the Hawk using much more powerful minions, successfully fought the Kushan empire (against which Guts did very little) saving a lot of people, and is in the process of creating his own kingdom, marrying the princess, and becoming in all rights a Crystal Dragon Jesus. But seeing as the manga is still ongoing, Griffith may yet get his comeuppance for what he's done...
At the end of Code Geass, there are at least a few characters in the wedding photo at the end who could fall under this, most notably various surviving Britannian soldiers, including Princess Cornelia li Britannia, who in the real world might be tried for their war crimes. And what of the newly married? Ohgi, who had earlier betrayed Lelouch in favor of Schneizel and his slanted accounts in an under the table deal for Japan, that would have also left other UFN nations out to dry, and also used Kallen as bait and threatens to kill her under suspicion of Geass without hearing her out, not only receives no punishment for said actions and hypocritical reasoning, but is rewarded for it as he becomes Prime Minister of Japan. Villetta, no stranger herself to screwing over Lelouch for her own ignoble reasons over the course of the entire series, including using a traumatized Shirley to capture him, shooting Ohgi during the Black Rebellion which partly led to its failure, watching over Lelouch during the year while he is amnesiac for the sake of nobility because of her knowledge of his Geass, and convincing Ohgi to betray him as she changes sides; even in spite of her part in Lelouch getting captured following the rebellion, even though Ohgi fully blames him for it in spite of this, as well as his own carelessness that made it happen. To rub it in, the newly wedded couple have a baby on the way. Compare and contrast to the self-sacrifices of Lelouch and Suzaku, who alienated from and made themselves dead to the world, literally in the case of the former and figuratively in the case of the latter, who also became the new Zero as per the Zero Requiem, which made the new peace possible for everyone else. Consider also that the two may not have went with such a plan, which also had a high degree of inferred destruction, if not for the aforementioned betrayal.
Hell Kaiser Ryou has several Kick the Dog episodes where he abuses his former friends and his own brother just to demonstrate how cruel and hateful he's become since his Face-Heel Turn. He faces no retribution for how he treats them, save for 'dying' at the hands of Yubel, which isn't really notable because everyone 'dies' that season, and they all get better, including Ryou. By the time Season 4 comes, Ryou's friends are treat him like nothing has happened and he and his brother - the same brother he electrocuted with a Slasher Smile - are closer than ever.
Yubel. Once Judai remembers the nature of their past lives, he completely forgives her for everything she put him, his allies, and 12 dimensions through because of her obsession with him. Albeit he blamed himself for her mental state, she had been corrupted by the Light of Destruction (turning her more dangerous), and reconciling was the best way to beat her at the time. He also took responsibility by taking her soul inside himself and thus prevented her from causing any further harm while her mind healed.
Kagemaru, who did God only knows what to the missing students and who attempted to destroy the world just to stay young. Because he's already so old, sick, weak and almost dead already, the characters decide there isn't anything they can do to him than let him go. Judai hugs him and wishes him well, though this hug is enough to break Kagemaru's spine and send him to the hospital.
Yu-Gi-Oh!: Saruwatari is one of Pegasus's biggest and meanest thugs in the first season, who just disappears after the battle with the Big Five in Season 1. Compare him with his bosses; Pegasus does a Heel-Face Turn and the Big Five actually die in the anime (when the virtual world where they are imprisoned is destroyed), but Saruwatari is last seen running through a door with some of his goons. Although maybe Kaiba beat him up again. In the manga, though, he was probably fired.
There was also Zigfried. His crimes may have been tame compared to most villains, and he wasn't capable of murder, but still, if he was punished at all for his attempts at industrial espionage that threatened to wipe out Kaiba Corp's records, the viewers never saw it. (In fact, the epilogue at the end of the series suggested that he and Leon were making a business deal of some sort with Pegasus, meaning he could well have gotten back on his feet because of it.)
Nezumi escapes after tricking Yugi and Jounouchi into confronting Hirutani, avoiding getting beaten up or put into a Shadow Game.
Anna Kozuki from Yu Gi Oh ZEXAL. Collateral damage is kind of rare in this franchise, but she tends to cause a lot of it, practically blowing up a good deal of downtown Heartland City trying to get to Yuma the first episode where she appears. She also ambushed, beat up, and then tied up one of the finalists of the WDC in order to take his place on the Duel Coaster. Not only was she never punished for what she did, Yuma and Kotori were strangely willing to overlook it, probably because she helped Yuma defeat the Fallguys.
Rimelda of Madlax kills off or is responsible for the deaths of the most likable members of the cast, including Madlax's apparent romantic interest, Vanessa. Not only does she survive in the end, but she gets together with Madlax. Presumably Bee Train was trying to replicate their success with Noir.
Mitogawa in Ga-Rei -Zero-, who, by virtue of playing a major role in the manga actual, escapes any form of punishment for what he did, despite being the one who singlehandedly kick-started Yomi's downfall. Thankfully, he gets his in the manga.
Despite ostensibly being one of the "good guys" throughout 2/3 of the series Mai-Otome, Nina Wang, who is the poster child for Love Makes You Evil and fits into about several dozen other tropes, pulls a selfish, spoiled, bratty Face-Heel Turn. She willingly and freely betrays everything she's ever stood for, tosses her morals and decency aside, murders her best friend, attempts to murder several of her other good friends, aids The Empire in conquering the world, and almost single-handedly completes 90% of a plan to bring about The End of the World as We Know It. Her excuse? She's a little cranky that her father (yes, they're not related by blood, but he's still her FATHER) refuses to see her as a woman and fell in love with her friend instead of her. She continues down this path even after her father, the only thing she cares about, DIES (he later lived, but she didn't know...) trying to stop it. Her outcome at the end of the series? Happily ever after, never answering for anything she caused or even having to face anyone or anything from her old life to remind or accuse her, taking advantage of her father's amnesia to make him fall in love with her for real this time. On the other hand, she becomes The Atoner in Mai-Otome Zwei, working with Nao to investigate the ruins and helping Arika defeat the Big Bad.
Throughout the course of the Mai-Otome anime, Psycho Lesbian / Smug Snake Tomoe has amassed for herself a pretty long rap sheet: assault, vandalism, attempted murder, kidnapping, blackmail, attempted rape... of a high-ranking school official, aiding and abetting terrorists, and at one point openly declared that she intended to kill anyone who stood in her way (read: everyone), and has shown no remorse for any of it. She never receives any sort of formal punishment, and the only retribution she gets for this is a few broken bones after falling out of the sky... which barely counts as a slap on the wrist compared to the lives she tried to ruin. She comes back in Mai-Otome Zwei clean as a whistle, presumably to do the same things all over again.
John Smith from Mai-Otome 0~S.ifr~. He kidnaps Sifr to take control of the ancient technology, and while he loses the Schwarz Space Station, M9 and quite a few of his men, he escapes in the end, albeit because the heroes' mission was about protecting Sifr rather than defeating Schwarz.
Nagi is not only arguably the main villain of Mai Hi ME (even though The Man Behind the Man was technically more powerful than him), but is directly responsible for everything the characters go through. He survives unscathed and mostly unconfronted for this, admits to the entire thing being a riotously entertaining good time, and happily takes Mashiro (one of the supporting characters) with him to his home... wherever.
Alyssa Searrs seemed to subvert this trope when Joseph Greer shoots her...and then is brought back to life. She is seen using religion to terrorize some student in the final episode.
Because it only covered about 60% of the manga, the Elfen Lied anime ends with Kakuzawa laughing maniacally and declaring his victory.
Schwarz of Weiß Kreuz were most likely allowed to become Karma Houdinis, despite being the Evil Counterparts of the protagonists and perpetrating quite a lot of carnage, by virtue of gaining enough of a fan following to become Ensemble Dark Horses. Sequel series Weiss Kreuz: Glühen sees two of them recast to some extent as Sociopathic Heroes and one more performing an arguable Heel-Face Turn, but none of them have been redeemed or seen any justice for their various acts of villainy. (Meanwhile, none of the protagonists escape anything like unscathed.)
Farfarello. The fourth member of Schwarz. He's arguably the worst of them all; aside of everything else, he accidentally killed Ouka, purposefully killed his mother and Tot (although she got better), and his ultimate fate? Apparently, he quits being an assassin and lives happily ever after with his girlfriend. Weiss is specifically ordered to assassinate Farfarello, and Schwarz curb stomps them within an inch of their lives.
In Magical Girl Lyrical Nanoha A's, the Book of Darkness decides to kill Nanoha and trap Hayate and Fate in eternal dreams. The one responsible for setting up the whole thing turns out to be Gil Graham. That person's fate at the end? Retiring back in his home country of England, Earth, with his two familiars to keep him company. He thought it was the only way to get rid of the Book of Darkness once and for all. It took Nanoha's over-powered ten-member party, which included the current master of the book plus the Arc-en-Ciel to finally destroy temporarily regain control of it.
Perhaps a more troubling example is the above character's accomplices, the Lieze twins, who, in order to activate the Book Of Darkness, absorb Shamal and Signum's Linker Cores, beat up Zafira to do the same to him, and then finish off Vita in front of Hayate while disguised as Nanoha and Fate. While all the people in question get better, no one brings up what happened or proposes any punishment for the responsible parties.
Keel Lorenz, the Nietzsche WannabeBig Bad from Neon Genesis Evangelion, not only gets to see his delusions come to pass, but we get to see him reacting with sadistic glee as he is assimilated into the "perfect being" that he has created. Though his actions were implied to have been reversed by the end of the movie, we never do see him get his comeuppance.
Otome Katou's so-called "friends" (Natsumi, Minami and Kumi) who cruelly bully Kotonoha, bring Sekai's friend Nanami to tears and ruin her reputation at school by showing a tape featuring her sex scene with her boyfriend/senpai and have sex with Makoto just For the Lulz, despite knowing their "friend" Otome is also sleeping with him get clean away too.
It looks like Taisuke is, if anything, even worse in the PS2 game extension. In the extended version of Sekai's Yandere ending (the one where she's pregnant and kills Makoto), Kotonoha strongly hints that Sekai's child (born few after the murder, taken care of by Sekai's mother and Kotonoha herself since the traumatized Sekai has disappeared) is not only Taisuke's child, but may have been conceived through rape as well.
The Higa team. The coach is a Jerkass, and doesn't receive any more comeuppance than being hit with a tennis ball by the captain of the team when he tries to leave. Half the team itself is comprised of unsportsmanlike Jerkasses who attack other teams' coaches, and the other half is just slightly less unsportsmanlike than that. Once they're beaten by Seigaku, it's as if all grievances disappear. They even show up in a comedic Breather Episode, and no mention is made of their earlier conduct.
Akito of Fruits Basket, in spite of spending most of the manga series being nigh-on Ax-Crazy and making the lives of every member of the Zodiac as miserable as possible at every opportunity, gets a last-minute redemption story via Tohru and ends up friends with her, Uotani and Hanajima, with Shigure as her lover.
Shigure also gets away with his various manipulations, and jerkassery, getting Akito in the end to boot.
It should be noted that the point of the story of Fruits Basket is that you should forgive and move on with your life so this is intentional with Akito. Also whenever Shigure manipulated people he did it to either break the curse or just for some amusement.
The resident Psycho for Hire Yazan Gable in Zeta Gundam, notorious for being the most cruel and immoral of the Titans, gets away scott-free even after Kamille completely dismantles his Mobile Suit. Although he does seem to meet his doom in the sequel, viewers never get to actually see his demise, which suggests that he may have cheated death once again. Hey, Yazan is not known as "the Immortal Cockroach" for nothing!
Yazan makes a brief cameo◊ in episode 27, and while unnamed, his identity is later confirmed in Gundam Ace. "Immortal Cockroach", indeed.
Also subverted with Louise, who committed many atrocities with the A-Laws, but lives in the end and has an apparent happy ending. The show director, apparently unsatisfied with this, makes it more clear in the following movie that Louise's life is far from happy now and that dying would have been easier on her, but she must instead live as The Atoner. At least, however, she has Sajiby her side.
Despite being a Super Robot OVA series, Dangaioh is heavily on the cynical side of the Sliding Scale of Idealism Versus Cynicism... and loves Karma Houdinis! To drive the point home, the main villain of the show (Garimos, leader of a population of parasitic beings who depopulate planets to fatten themselves) never gets punished for his crimes. Another villain, the psychotic cyborg Gil Barg, dies in the first OVA, but is then resurrected as an even worse Ax-Crazy murderer, thus making his comeuppance null and void.
Glass Fleet's Manipulative Bastard Vetti Sforza uses his allies as tools and turns against them when they've served their purposes, is responsible for the deaths of Michel's father and brother, seduced if not actually raped his foster mother in order to get her to kill his foster father and then murdered her once she'd done it, drugs and apparently rapes Michel, and kills Cleo, his own twin brother, while Cleo is trying to save the world. He states up-front that all of his efforts are for the sole purpose of prolonging his own life. Not only does he never receive any particular comeuppance, he ends up receiving instant redemption courtesy of some last-minute Epiphany Therapy with Cleo's spirit, and becomes the rightful leader of the entire galaxy, with Michel's apparent ungrudging support.
In InuYasha, Sesshomaru gets a very long Character Development arc to end the story as an Anti-Hero with a happy ending, having gained the sword he always wanted, had his missing arm restored, his conflict with his brother resolved, and being much more easy-going than he used to be towards humans. In the early stages of the manga, however, he would kill people just because he could.
Vandread has Rabat, more of an Honest John, but later on he says that he deliberately leads Harvest Fleets to wipe out potential dangers in return for them sparing him. And before that, deceiving the Nirvana's crew, trying to steal Hibiki's mech, and then beating him senseless whilst lecturing him on 'using his own words' despite his own deceit and greed, before escaping. Despite helping out later on, it's a wonder he doesn't receive some sort of misfortune for his actions.
Akabane Kuroudo in the Get Backers manga, gets away with a surprising amount of this by the end.
Shinji/Paul in the Pokémon anime, has gotten away with countless cases of psychological and physical abuse towards his own Pokemon, equally countless cases of neglect and abandonment, multiple counts of poor sportsmanship, conduct unbecoming a Pokemon trainer outside the arena, one count of critically demoralizing a Gym Leader, and one Rage Quit, among others, with nary a word in reprimand for it. In fact, he's quite often praised for being a "strong trainer" instead!
It is possible that the writers learned of Paul's Misaimed Fandom, as his methods mirror those who play the Pokémon video games competitively, and those people came to see Paul as their representative on the anime.
Sabrina is also guilty of being one of these. At a young age, she transforms her mother into a doll, later does the same to Ash and his friends, nearly kills them inside of a toybox, and all of these are brushed aside because Ash got her to laugh and earned his Marsh Badge (without a single sentence of gratitude or apology given), yet Pokemon League Inspectors have come down hard on people and threaten to revoke their licenses for less than that.
In fact, some could say that being a gym leader is a necessary form of Plot Armor.
Cain from the Trinity Blood anime, was pulling the strings behind all those events and...he gets away at the end.
Ryuk was the catalyst for several years' worth of murders, simply because he was "bored." At the end, he just goes back to the Shinigami world from whence he came, with nothing to stop him from returning to the human world and causing another murderous streak. It doesn't help that the only way a Shinigami can die is by using a Death Note to save the life of a human, something Ryuk would never do.
Hitoshi Demegawa. While in the manga he's just a greedy, obnoxious character, the films take it up a notch, wherein he sexually harasses Takada. He is killed by Teru Mikami in the manga and anime, but does not die in the film.
Misa Amane, in the films. At the end of the second film, she is shown to have been let go of by the police after losing her memories of having used the Death Note, despite having previously killed Mogi (who dies here in place of Ukita in the manga). However, the police couldn't convict her without exposing the existence of the Death Note. Plus with the Note's destruction, she will as mentioned before lose her memories.
Near, arguably the most underhanded and painfully dishonest of Light's opponents (which is saying a lot), not only lives on but becomes the third L and commands the task force from time to time. It's even suggested afterwards that he may have only been able to catch Kira by controlling and killing Mikami with the Death Note.
Momoko from Telepathy Shoujo Ran has quite a history of atrocious behavior throughout the series, ranging from putting masses of people under mind control up to getting a woman killed so she can get her hands on some special plant. At one point she also plays a major part in an effort to eradicate all of mankind. Her fate? She gets to bring her grandmother flowers in the hospital. That ought to teach her.
The Psycho Lesbian Duo from Strawberry Panic! got away with attempting to wreck a school play, messing around with the Etoile Elections, and two separate cases of Attempted Rape. Kaname takes this one step further by using Momomi to get closer to Amane, her real crush...and they got back together in the finale. To a lesser extent, Shizuma gets away with messing around with every attractive student in the school.
Tsukiko from Paranoia Agent destroys most of Tokyo because of her mental instability. Her fate? She walks the streets two years later as if nothing ever happened.
Asuham Boone from Overman King Gainer. Towards the end of the series, his obsession with getting back at Gain for the whole mess with Asuham's sister Karin degenerates to the point where Asuham willingly manipulates Cynthia and a lot of his underlings (and President Munt himself) in order to awaken the Overdevil, an Eldritch Abomination capable of destroying the world. He never seemed hesitant nor regretful about it... and all that happens to him is that he gets his Dominator shot down and gets a What Were You Thinking? speech from Karin herself (who had come to terms with the fact that Gain's relationship with her wouldn't have lasted). Not much of a punishment, huh? Understandable in that Yoshiyuki Tomino had come out of his problems with depression and was producing lighter and more idealistic shows... but still, some were dissatisfied letting Asuham go like that, after all the crap he pulled.
Rau Le Crueset from Gundam SEED, Omnicidal Maniac and Nietzsche Wannabe (although many would consider him a Woobie, Destroyer of Worlds). Dying at Kira and the Freedom's hands after killing Flay was not much of a punishment for him, considering Le Creuset was also a Death Seeker. So, in the end, he got what he wanted, and was Breaking Speeching the hero from beginning to end. Some have theorized that Le Crueset shot down Flay's shuttle exactly because he wanted Kira to be enraged enough to kill him...
In Gundam SEED Destiny, Rau's "brother" Mu La Flaga faces no consequences of any kind for the atrocities he committed while suffering from amnesia as Neo Roanoke. In this case, it's most likely a combination of the fact that he himself is a victim of LOGOS's brainwashing, and that the crew of the Archangel know basically nothing about what he was up to before they took him in.
Genpou Saji in Ikki Tousen. He orchestrated everything and somehow no one feels compelled to harness their rage and kick the crap out of him. If he had an actual reason to be forgiven, or had some further development later then it would work, but he's let go like he never did anything. Saji's appearance in Great Guardians doesn't fix things.
Strongly subverted in the manga, where his manipulations are not only generally well-intentioned and far less damaging, they eventually do get him killed by Hakufu. This, in fact, is even part of his plan, which he thinks of as his due comeuppance.
In Tokyo Babylon, Seishirou Sakurazuka is this, managing to walk away at the end of the series with nothing more than a lost eye (which is lost willingly, by the way) after killing one main character and horribly breaking another, in addition to many other murders he himself claims to have committed. It's not until X1999 that he finally gets some karmic retribution, but considering that even then he dies on his terms by what amounts to assisted suicide...
Franken Fran is better-known for its particularly vicious Laser-Guided Karma...but the villain of Chapter 21 manages to pull this off. Not only does the greedy, self-serving, abusive child molester live, but he manages to get a job at an amusement park where he'll be surrounded by children. The sum total of his "punishment" is that he's trapped in a living mascot costume... which will only make it easier for him to find victims. Fran is too much of a Cloudcuckoolander to see anything more than slightly odd about just how happy he is with this outcome.
In Heat Guy J, Daisuke's older brother (and boss), Shun stages a coup d'etat and tries to enforce martial law in Judoh, but gets granted amnesty because of the good things he'd done leading up to that as the police chief.
Ms. Nomura of Higurashi no Naku Koro ni, who along with her cohorts in Tokyo, funded the schemes of Big Bad Miyo Takano to wipe out Hinamizawa and its residents get off scot free when said scheme fails by making Takano their scapegoat for the entire plot. This is in spite of them being as quite guilty of causing the disaster as Takano, and unlike her, having NO Freudian Excuse.
Doubt has a massive one in Rei. Who orchestrated the entire event, is shown to have done it at least once before, and comes out from it all with everyone who knows the truth dead and the only survivor hypnotized, psychotic, and ripe to take all the blame while she dances of scot free to do it again gloating all the way.
Sae from Peach Girl. She does do some make-goods, and she encounters some serious setbacks and heartache, particularly in the manga sequel/spinoff, Sae's Story. But the pain she puts Momo through - at one point threatening to disgrace her on an international level, just so Toji will break up with her, and making Momo believe she's been raped - means that she should have had some kind of beatdown. The classmates she tricks early in the series to hate Momo are ready to hold Momo down and maybe hit her, but no such brutality is even mentioned when Sae is majorly exposed. She doesn't do a complete Houdini, except when the level of her actions is taken into account. Her pain with Ryo was largely self-inflicted, so it really doesn't balance the scales.
Nabiki Tendo from Ranma ˝. She runs small scams and petty blackmail schemes all over the place but was only called out once.
Almost all of the villains in Black Cat do not die or suffer any permanent injury. Some are never even defeated or fought. Only one member of the Apostle of the Star dies. Some undergo a Heel-Face Turn. Creed is defeated but spared and actually saved by Train, in spite of the things he had done. Even the leaders of Chronos who turn out to be pulling the strings are never defeated.
This is also true in the manga. Letting Creed go may actually be excusable (as his mind is more or less broken) but Kyoko? Shiki? The Doctor?!
Rome-Ro from Heroic Age gets away with quite a lot of things from mass genocide, to brutally abusing Yuti-Ra. The two princes cheat death three times and eventually become the rulers of the known universe, after blowing up Jupiter, leading their entire fleet into suicide and bombarding the Bronze tribe homeworld, killing billions of helpless larvae.
Care to guess the ultimate fate of Goldie Musou, the main antagonist of Gunsmith Cats, a brainwashing, drug-dealing Psycho Lesbian crimelord? She ends up in a happy, debatedly consensual relationship with Misty Brown, a protagonist she once kidnapped, brainwashed and presumably raped. And she doesn't even quit being a drug-dealing crimelord, albeit becomes a less psychopathic one, because apparently, it'd be worse if she was ousted.
Hao of Shaman King. Screw Freudian Excuse, the guy had an organization made of people whose lives he ruined after him, he ruthlessly killed all of his opponents in the Shaman Tournament and then devoured their souls, many members of said organization among them. His punishment in the manga version? He succeeds in becoming the titular Shaman King.
In the Shangri-La anime, Nagiko and Tarsian instituted a system of child sacrifice yet are never called to account for this and are seen flying off together scott free in the last episode.
Nina Purpleton in Gundam 0083 is partially responsible for the success of the colony drop, stabs Kou in the back (after lots of tedious relationship development setting them up as a couple that culminated shortly before this) by running back to her old boyfriend (who happens to be Gato, one of the major villains) and then pointing a gun at him to protect the villain, and this on top of being a bitch to Kou for most of the series. And not only does she get off scott-free in the end, she has the audacity to smile at Kou in the epilogue!
Accelerator in A Certain Magical Index killed ten thousand innocent people in the name of an experiment and an unknown but undoubtedly large number before that, though they were admittedly less so. Punishment? A hit to his ego and being punched a few times. At least until he voided the Karma Houdini Warranty, anyway...
Throughout Infinite Ryvius, a shadowy conspiracy launched a False Flag terrorist attack against a school, tried to murder everyone aboard (resulting in the deaths of the entire faculty and many students,) chased after the surviving students (all children) and attempted to kill them all, caused massive collateral damage in the process, blocked the students' attempts to communicate with anyone, framed the students for everything that happened so far, and blew up an inhabited moon. In the last episodes, one of the naval officers they've duped finds out about the situation and publicly exposes the whole thing before killing himself in shame, the result? They're apparently given administrative control over researching the Super Prototype spaceship the students survived aboard while being hounded around the solar system in. Oh, and the protagonist (who, up to this moment has been an utter Butt Monkey) slugs one of them in the face after considering their apology.
Many characters in hentai. Rare is the sex scene that's consensual throughout for both parties.
Take Etsuko Yamanobe, from Foxy Nudes. She's a newscaster covering a hostage crisis, but to get hot ratings, actually manipulates the drunk kidnapper into raping his boss's daughter repeatedly, gives him a gun, tells him its fake, and when he opens fire, a sniper tries to shoot him and accident hits...the hostage. The kidnapper goes to jail while Etsuko goes to have happy sex with her camera man and enjoy great ratings, and the show treats it like a happy ending the entire time.
Waiting for that treacherous Bitch in Sheep's Clothing Rosemary from Ashita no Nadja to finally get what's coming to her? Well, when the series ends, you'll still be waiting. A slap in the face is the most she receives for her crimes.
In Goshuushou-sama Ninomiya-kun, the main villain is duly punished, essentially with death (Reika's dark side disappears or gets reabsorbed or something). But Hosaka has happily assisted with every step of the evil plan, from simple kidnapping to chucking a woman out of a helicopter... and his comeuppance consists entirely of losing to Shungo in a fight. The woman even forgives him! (So okay, she survived, but he wasn't sure she would.)
In one episode of Cowboy Bebop, Chessmaster Hex gets away scot-free simply on the grounds that he's too old and senile to remember the plan he set into motion 50 years ago that just now activated. That is, until his old age takes its final toll and he passes away in his sleep.
In the anime Jyu-Oh-Sei, the evil character Nagi murders innocent people. He is never punished for what he does and never shows any remorse. Not only does he live at the end of the series, but the good characters like Thor and Tiz continually defend him and save his life.
In Gilgamesh, Dr. Monica and the rest of the original scientists survive to the very end of the series with no one else left alive to exact retribution upon them. Monica killed off many people especially during the Twin X incident. At the end of the series he manages to kill off the main characters and the rest of the human race. What happens to him after the end of the series is unknown. Even if he ceased to exist, which is likely what happened, it's still not karma, because that's exactly what he wanted to happen.
Dilandau in the Escaflowne movie gets away scot-free with his surviving Dragonslayers, without showing any remorse for his previous actions. He just shrugs, comments that there will always be new wars for him to fight, and rides off into the sunset. What's worse is that the scene has an extremely positive tone to it, like he somehow deserved to live and continue his life of violence and bloodshed without learning a thing, except maybe "don't try to fight Escaflowne".
Surprisingly, Air has this in the form of the Buddhist Monks. Their crime? Killing an innocent (albeit powerful) girl who left the temple to go see her mom, then proceeding to put a curse on her soul so that she will die every time she feels love. This leads into Misuzu's death as well. They get away with their crimes. The sadder part? Someone was considering going on a Roaring Rampage of Revenge on them, but was stopped because it wouldn't be what that girl would want.
Izaya Orihara from Durarara!!does get punched for his actions. Once. In the anime only. For emotionally destroying a middle schooler and causing a huge gang war that puts an incredible strain on the relationship between three of the main characters. He also gets hit once by a trashcan Shizuo threw, but this is Played for Laughs and has no effect on him, and blatantly doesn't make up for having framed Shizuo for numerous crimes and sending wave after wave of thugs to attack him when they were in highschool. The novel however subverts this as karma is starting to come back and hit him particularly getting stabbed by Jinnai, leaving him in the hospital for days when anyone who hates him can come and kill him. Karma seems to have hit him in volume 9 when he's tortured by Earthworm but this is later subverted too as it turns out he had everything planned out from the beginning and was waiting for the best moment to humiliate her.
If Johan got away in the end, Michio Yuki also counts. He may failed to gas the whole world and loses Garai, but he manages to get away clean from it by posing as his younger lookalike brother.
She did almost earn a punch from Kyon for those last two offenses (the last straw being the "Mikuru is my toy" thing), which promptedherimmediateHeel-Face Turn (even more immediate in the anime version), so this could be a subversion. Doesn't stop her from molesting Mikuru in "Someday in the Rain" just for old time's sake, but then again, that may just be the author confused about the timeline he had set up in Anachronic Order.
In Love Hina, Kanako rapes Motoko while disguised as Naru to sow chaos among the residents. The incident is briefly mentioned when the residents attack Naru, and then when the real culprit is found, completely forgotten. Kanako suffers no punishment for this and other cruel acts.
To a lesser extent, Zelgadis. One of his favorite methods of getting something involves either murder or getting someone hurt, but he does it far less often than Lina.
Rezo, Rezo, Rezo...a priest who healed people far and wide...and experimented on others, often to the point of death, and sacrificing a kingdom to open his eyes...sure, he apologized in the end, but still.
Windaria Lagado and Selenia. Both of them apparently get away with their evil deeds.
President Kuroi on the anime version of THE iDOLM@STER, shows himself to be a Jerkass on a great caliber, attempting to sabotage the 765Pro idols only to prove himself 'superior' to 765Pro's President Takagi. In the end he's shown laughing to himself as his last scheme agaisnt the 765Pro Agency works wonderfully and they can't do anything to get back at him. He did lose his Project Jupiter, who's sick of his sabotaging, especially that one event involving slandering Chihaya with her Dark and Troubled Past to the point of traumatizing her, but considering that in his last words, he said that the Jupiters are expendable and he can find another group, it's only a matter of time until he rises back up to try and slander 765Pro again.
Hatori from Sekai-ichi Hatsukoi comes off as one. While most semes in yaoi anime tend to get away with raping their uke and said uke falling for them, this series is known for avoiding the Rape is Love trope to make it more realistic. However, what has made people remember Hatori is in the novel he brutally rapes his best friend Chiaki after thinking that he lost said best friend to his rival Yanase. What makes it stand out though is during the rape scene, Chiaki is shown to be screaming and begging him to stop and not enjoying it at all unlike other yaoi rape scenes. Hatori tries to atone by quitting his job but given that Chiaki is an idiot, he begs him to stay and they hook up...thus starting their rather unbalanced relationship in the series.
It gets worse as the series progresses. By episode 16, it's like Hatori is trying to see how much he can get away with his yandere tendencies. In the episode he gets to cancel his date with Chiaki and expect him to be fine about it, goes to meet his ex girlfriend (he was meeting her due to work but Chiaki thought he was cheating on him behind his back, and it's later revealed by Yanase that he went out with a lot of girls during his high school year and that it's not impossible to think that), and finally barges into Yanase's house and proceeding to beat the crap out of him and then forcing himself into Chiaki's house. And what does he get? He gets yelled at by Chiaki for simply skipping out on the date and he gets Chiaki to calm down easily. The last concerning Yanase is the cause of a huge backlash given that Yanase was just rejected by Chiaki a second time and entered a Heroic BSOD and Hatori proceeding to beat him up counts as a huge Kick Them While They Are Down moment that leaves a bitter taste in the viewer's mouth.
Subverted with Mercenary Tao Pai Pai in Dragon Ball. The character kills a couple of innocent people and nearly Goku and another kid, and after his seeming death it's later revealed he was brought back as a cyborg, and though he's last seen being defeated by Tenshinhan, Dragon Ball Z reveals he's still causing trouble during the Cell Saga. But then you remember that at the very end of the series Kid Buu blows up the Earth with everyone on it, and when the heroes used the dragonballs to revive everyone, they made sure that the truly evil people were excluded, and considering that Tao definitely isn't a good person...
Although in his case it's played straight if you count Dragon Ball Online as canon, he either survived Kid Buu destroying Earth or SOMEHOW got revived along with all the good people on Earth, 216 after Goku trains Uub and he's still causing trouble, he even gets an upgrade!
Also subverted by Vegeta. He gets a spot on the team and marries Bulma despite having spent most of his life as a genocidal, remorseless maniac. When he gets ready to blow himself up to kill Buu, he asks Piccolo if he'll see Goku in the afterlife, to which Piccolo replies that he's certainly going to hell for his past actions. He would have, if they hadn't decided to revive him because he was too useful to waste.
Played completely straight by the Red Ribbon Army's Colonel Violet, who in the anime flat-out murders several of her own men in cold blood to distance herself slightly from a pursuing crocodile and spends her remaining time in the series stealing huge quantities of money. Not only is she one of the only three major officers to survive the events of the saga, she escapes without taking so much as a punch.
Beers from Dragon Ball Z: Battle of Gods is another straight example. While he's friendlier and less evil than Frieza, Cell, or Buu, still gets away with some unpleasant actions. He cruelly used King Vegeta's head as a footstool in front of his own son Prince Vegeta while making him treat him to an Eight-Course Banquet, knowing that he is much weaker than him and with no posibility of defense, and has been responsible for numerous genocides throughout the universe.
King Yenma tired to subvert this to Dabura with an ''Ironic Hell" twist by sending him to Heaven since Dabura would have enjoyed Hell, but Heaven's innate goodness in essence "purified" the former Demon King and he ended up enjoying Heaven.
In Axis Powers Hetalia: Paint it, White!, the Pictonians nearly get away with converting almost all of Earth into their species, and only only are convinced to reverse it all after Italy amuses them by drawing faces on them. Of course, given that the Pictonians vastly outnumber the nations and have them all outgunned, just getting the Pictonians to undo their damage and leave was probably the best to be hoped for.
Mykage from Aquarion Evol. Despite killing Jin, Izumo and Alicia and manipulating Kagura and Zessica into doing his evil bidding. He gets trapped in Apollonius/Zen which is what he wanted all along.
In Naruto, the Hidden Cloud village doesn't appear to undergo any hardship for the kidnapping attempt they made on the daughter of the Hyuuga clan head during diplomatic negotiations, and indeed their Refuge in Audacity response, to demand the body of the man that had killed their ambassador while he was running off with his daughter, resulted in the death of a Konoha ninja and inflicted years of mental trauma on Neji. The only time this is brought up is when Yamato reminds the Raikage that the Leaf Village had to accommodate their demands for the sake of peace in the past.
Sasuke Uchiha has betrayed his village and every single person he's ever worked with, and in the last ten chapters, effectively every single person in existence. He's pulled a You Have Outlived Your Usefulness on Orochimaru, Suigetsu, Jugo, and Karin, including actively attempting to murder Oro and Karin (the latter just because she was in his way), plotted to destroy his home village and everyone in it by becoming a terrorist and joining the Akatsuki, assaults the Kage Summit killing many innocent samurai and cause the building to collapse, shuts down Sakura's declaration of her love for him by mind raping her with an illusion of him stabbing her to death, and attempted to kill Naruto, the five Kages (who were helpless and comatose due to a Lotus-Eater Machine at the time by the way), and the Tailed Beasts in order to take over the world. The team he assembled forgives him with no hard feelings, including Karin going right back to being in love with him. And what does he get at the end of the series? He loses a hand in his fight with Naruto, apologizes briefly for what he did, and all of his crimes get pardoned since he had a part in saving the world and Kakashi, as a kage, puts a good word for him. He's now treated as redeemed and has a daughter with Sakura.
Obito Uchiha has attempted to murder an infant that has just been born, summoned the nine-tails to Konoha killing lots of people, send the state of the Kiri village to hell, formed the Akatsuki that is responsible for even more deaths, aided Itachi in killing off his own clan, and started a pointless war causing many people to die all because he is throwing a temper tantrum towards Rin's death. Yet when he finally does a Redemption Equals Death, he reunites with Rin in the afterlife with open arms with Rin stating that Obito is simply a misunderstood fellow as if she forgot every heinous act Obito did after she forces Kakashi to kill her. Naruto himself calls Obito an awesome guy, knowing he was the same man that caused most of the problems in his life, including killing his parents, leaving him the bullied orphan he was for most of his life.
Several villains from One Piece, like Wapol and Enel, don't get punished in the long run. Sure, Luffy kicks their asses seven ways to Sunday, but things turn out OK for them in the end anyway. This is also globally the case for the World Nobles, the biggest assholes in the series, who are so above the law that they can get away with anything (And by anything, we mean, among other things, kill children because their boat crossed paths with theirs, feed little girls Devil Fruits for their own twisted pleasure, own and abuse the fuck out of slaves, and all around beingungratefulmotherfuckers.)
One reason for Enel/Eneru getting away and accomplishing at least one of his goals (to fly off to Endless Verth on his airship) could be justified as a sort of Deus Exit Machina. Being one of the most powerful characters in the One Piece universe (to the point that the only way he could be beaten was because Luffy's Devil Fruit powers with just happened to be able to counter his lightning abilities) and being in a location where the Marines and their Devil Fruit-cancelling sea prism stones wouldn't be able to reach and capture him, it would've been easier to just let him escape and go far away where the plot can't reach him.
In Chuunibyou Demo Koi ga Shitai!, there is Touka, who gets her happy ending when Rikka is forced to get over her chuunibyou and goes to Italy to pursue her dream of becoming a master chef while everyone back in Japan angsts and struggles with the situation that she left behind.
In Sword Art Online, Kayaba Akihiko the Big Bad of titular game is responsible for cyber kidnapping 10,000 people forcing them to beat the game results in the deaths of nearly 4000. Only after the fight he gives Kirito some half-assed explanation and he gets Easily Forgiven.
While Kayaba is forgiven he still dies at the end. However, members of player killer guilds such as laughing coffin and titan's hand commit murder and get away with it. Even if they identified players with all the data deleted there is no way to tell if they did kill players. Not to mention Kibaou who wants to rob beta tester, sends guild members to their death, extorts weak players, and send a rival guild member to his death to cover up his crimes.
Mori Soiken from Ninja Resurrection. He murders two innocent children to blame it on the attacking ninjas, after Shiro the priest is fatally wounded Soiken convinces him to give up Christianity and be reborn as a demon to get revenge on the ninjas, the process involves sacrificing his own daughter having the reborn Shiro burst through her body killing her, then the reborn Shiro slaughters the villagers indiscriminately while he watches proudly, if the series had continued he would've likely been punished.
Invoked Once an Episode in Super Milk Chan: Milk performs a number of bad deeds and behaves irresponsibly, and by the end of every episode, her assistant Tetsuko, the only character with a strong moral fiber and a good work ethic, receives all of the blame while Milk gets the credit as a hero. Occasionally, other characters will also pile blame on Tetsuko.
In Princess Tutu, even his own grandson ruining things doesn't discourage Drosselmeyer (at worst he's a bit disappointed), and it's hinted that he'll continue writing new stories, the only difference being now he faces some serious competition.
In Baccano!, three of the serial killers get away with all of their crimes, including not only complete killing sprees but also torture and mutilation. One of them is apparently about to get married.
Care to be more specific? Because the one about to get married only killed hijackers and an immortal boy who wanted to use one of said hijackers to kill the innocent passengers.
The Genei Ryodan from Hunter × Hunter kill a huge amount of people across the series just to find valuable items. The leader himself says that he does not care about the victims. Kurapica is on a quest to destroy them but instead the main characters worry more about him killing others rather than the Ryodan's activities. Across the story, only two members die and group is still doing whatever they want.
Muraki Kazutaki (Yami No Matsuei) got away with a impressive number of things. Even though he was stabbed by Tsuzuki at the end of Kyoko it can be assumed that he survived somehow. After all, his body was never found and Hisoka's marking didn't disappear...
Yukari Sahashi from Sekirei rightly earned her title as the "Devil Ashikabi" for violently assaulting and hospitalizing her rivals. However, her violence against even innocent Ashikabi is played for laughs, and no one even remotely calls her on behavior. She was last seen escaping the Sekirei Plan with Shiina.
Mikogami seems to have managed this for much of the series, escaping any punishment for his attack on head researcher Takami. That may be justified in that the Plan is run by an Diabolical Mastermind who prompted turns the entire incident into an exciting event. However, things eventually do catch up with him in a big way when Sanada's realAmazon Brigade slaughter the majority of his Sekirei in a matter of moments. Akitsu sacrifices herself to stop them, resulting in a hefty dose of Break the Haughty for the formerly arrogant Mikogami.
Mr. Kimura always manages to get away with blatant sexual harassment towards female students, especially towards Kaorin.
Similarly, Yukari always gets away with bullying Chiyo, a 10-13-YEAR OLD GIRL. And nothing is ever said as to whether she got in trouble for hitting Tomo with cafeteria plates. To be fair, though, Tomo hit Yukari first while aiming for Yomi, but teachers are never supposed to retaliate.
In YuYu Hakusho, Sensui is killed by demon Yusuke...which is what he wanted. Then Itsuki takes him away so his spirit won't be judged in the Spirit World.
Minor examples are Mr. Iwamoto and Mr. Akashi. Iwamoto steals a bunch of stuff and frames Yusuke for it, while Akashi arranges for Kuwabara to be beaten up. Neither really gets their just desserts.
Kensei from Kenichi: The Mightiest Disciple. Despite having conducted dangerous "experiments" on his disciples, despite having killed Tanaka's wife, master, and Tanaka himself, despite having played a major role in nearly kicking off a world war... at the end of the manga, he has not received a single defeat and is still alive and well.
Sir Isaac Ray Peram Wescott from Date A Live commits many atrocities within the span of his appearance and is apt at getting away with all sorts of them.