Times where the hero creates their own villain in Anime and Manga.
- A very interesting variant is presented in Bakuman。. It's the unique and slightly dark manga that the main characters wrote that sets the biggest Jerkass in the series, Toru Nanamine, on the path to becoming a conniving douche-canoe when he becomes old enough to publish his own manga. For instance, the short that they publish, Money and Intelligence, which takes place in a world where people are ranked based on how smart they are and how much money they have, convinces him to borrow lots of money from his father so he can essentially buy his way to popularity at school, and rely on the advice of people from the internet to revise his manga and give him ideas. Oh, and that last part has the added bonus of completely screwing over his Nice Guy editor.
- Licht, from Cheat Skill "Shisha Sosei" ga Kakusei Shite, Inishie no Maougun wo Fukkatsu Sasete Shimaimashita, is a young man with the special ability "Resurrection," who makes his living as a member of an S-Rank Adventurer's Party. However, the king, who feared his power, ordered his comrades to betray him, and in the end, executed him in an unfair manner. But Licht, who was fortunate enough to be revived because of his own skill, now, swears to carry out his revenge on humanity…
- Happens twice in Code Geass. The first time is a complete accident as there was no way for Lelouch to know just how obsessed Nina was with Euphemia, so when she was killed by Zero Nina became one of the biggest threats due to creating a nuclear bomb. The second time is more heartbreaking as it happens to Lelouch himself after the Black Knights turn on him after listening to Schneizel. With nothing else left to him, Lelouch becomes the Evil Overlord they considered him...however that was also invoked by Lelouch for his final plan.
- Beyond Birthday in the spin-off prequel novel of Death Note was the result of L and Watari’s Tyke Bomb production program.
- As was Kimiko Kujo in the Alternate Continuity Film L: change the WorLd.
- Daltanious: Literally. Dolmen was the clone who brought Helios's downfall, and was manufactured to be a mere slave to them until he broke free to exact his Revenge. The Helios Empire frequently tortured clones, harvested their organs, and treated them like second-class citizens, killing them when they outlived their purpose. He even lampshades that even if Daltanious kills him, as long as clones exist, their wrath and generational trauma will always exist. Harlin, to avert this, passes laws forbidding the discrimination of clones when he becomes crowned King.
- In Digimon: The Movie (the dub compilation of the first three OVAs) it's suggested that Willis is the one who created Diaboromon (and the virus that infected him was passed on to Kokomon.)
- Dragon Ball:
- Dragon Ball GT: The Shadow Dragons came into existence because Goku and the Z-Fighters excessively used the Dragon Balls to undo evil acts. The consequences were removed but the bad karma (or "negative energy" in the dub) was not. Throughout the final arc of GT, several of the Shadow Dragons take their time to remind Goku that their existence is his fault.
- Dragon Ball Super: Future Trunks' timeline shows that Zamasu would have continued to serve Gowasu despite his grudge against mortals for many years. His present self meeting Goku and being defeated by him in a sparring match pushed him to start planning the genocide of both gods and mortals, starting with taking Goku's body by using the Super Dragon Balls. However, once Future Zamasu enters the picture and we discover that he almost immediately jumped on-board with Goku Black's plans, it quickly becomes apparent that there was already something rotten inside Zamasu long before Goku ever met him, and even if Goku hadn't triggered his Start of Darkness, something else very well might have. Of course, it's still an example of this trope, as Goku himself points out that Zamasu would never have become strong enough to accomplish his goals had he not stolen Goku's body.
- The Amestrian military in Fullmetal Alchemist are by no means heroes, committing genocide against the Ishvalans before the events of the series. This was exactly what created Scar, whose only goal is to avenge his people by hunting down and killing every State Alchemist and high-ranking military officer (even ones who weren't even in the military during the war, like Ed).
- In Macross Frontier, Word of God states that at least in one continuity (there are several) Ranka lured the Vajra to 117th Fleet just as Grace was getting married, which resulted in Grace's bridegroom being killed, and Grace being mutilated, which turned her into a cyborg, triggering her downward spiral to becoming the Big Bad.
- The Federation in the UC Timeline of Gundam has increasingly become an example of this in recent installments. As of Gundam Unicorn, Zeon was ultimately born of a mostly successful internal attempt to prevent pro-secessionist wording from going into the Federation’s charter minutes into the Universal Century. Such wording would have functioned a bit like a safety valve, enshrining in law the right of the colonies to secede as they became self-sufficient, stable, and as space-adapted humans turned up among them. Without it, those fancy O’Neill cylinders turned into political pressure cookers, and Zeon and its extremely bloody twenty years of successor movements ultimately exploded out of them.
- Basically everyone in Mobile Suit Gundam SEED created the nightmare scenario that nearly wipes out the human race by the end. Coordinators initially abused their genetic superiority and lorded their privilege over Naturals, creating spiteful people like Murata Azrael, who goes on to lead the terrorist organization Blue Cosmos and orchestrates the nuclear strikes on the Coordinator homeland. These kill numerous people, including the wife of Patrick Zala who starts advocating for complete Coordinator supremacy and builds a Kill Sat that he aims at Earth to get revenge. Both sides then attempt to exterminate the other completely, killing billions on both sides over the course of two wars.
- All of the above, but especially the genetic scientists who started the Ultimate Coordinator project and the rich businessman Al Da Flaga who funded them, created the series Big Bad, Rau Le Creuset, by cloning Al and forcing him to be a perfect copy of his genetic "father." The scientists wanted funding, Al Da Flaga wanted to be immortal through his clone, and humanity as a whole wanted progress at any cost. When Rau turned out to have premature aging, they discarded him and tried again. Rau killed Al in retaliation, Blue Cosmos killed the scientists, and after watching humanity rip itself to pieces, Rau decided that none of us were worth saving and orchestrated events to provide Murata and Patrick the means to enact their revenge simultaneously, thereby wiping out both halves of humanity.
- Gradually becomes a more and more prominent theme in My Hero Academia. Several of the series' most important villains (Shigaraki, Spinner, Dabi, Stain, Himiko Toga, etc.) are revealed to have become what they are due to hero society's rampant prejudice and structural discrimination against those who have "villain-like" Quirks. Even one of U.A.'s own hero students, Shinso Hitoshi, points out that society doesn't even try to give children like him a chance to prove themselves, instead just assuming that they'll become villains from the moment their Quirks first manifest in early childhood. This is worsened since the Big Bad, All For One, is entirely too aware of this issue and is shown to actively prey on oppressed people to turn them into his minions.
- Perhaps the best example is Number Two (and later Number One) Hero, Endeavor. His biggest failure as a father and a hero turns out to be his inadvertent creation of Dabi, one of the nation's worst serial killers and mass terrorists... and Endeavor's own long lost eldest son, Toya Todoroki. While Shoto did grow up bitter and detached, he was able to recover thanks to his friends; Toya, meanwhile, was driven completely insane by Endeavor's extreme abuse and neglect and ended becoming a violent, cruel man hell-bent on destroying hero society completely, but especially, on making sure that his father remains haunted by his past mistakes for the rest of his days.
- Danzo from Naruto kept on doing this, with at least three different characters.
- First he helped Hanzo capture Konan, which resulted in the death of Yahiko, and Nagato's mental breakdown.
- Then he had Itachi murder the entire Uchiha clan, who however left his brother, Sasuke alive. Guess who fights and fatally wounds Danzo, after the Big Bad revealed this bit of information to him?
- Apparently, Kabuto Yakushi joined Orochimaru because Danzo had set up him and his adoptive mother — both faithful and competent spies working for him — to murder each other, but Kabuto survived.
- The World Government in One Piece seem to have a really bad habit of this if certain people escape from their cruelty and grow strong enough to be a threat.
- Hancock in a way, despite being introduced as a Jerkass who kicks small animals and thinks all men in the world are trash. She utterly loathes the Government due to the fact she and her sisters were kidnapped as kids, sold into the slavery of a World Noble and forced them to eat Devil Fruits just for their entertainment. It's obvious if Hancock had the chance, she'd kill one on the spot. Heck, the main reason she helped Luffy at all, besides Love Sickness, is because of learning that he punched a World Noble.
- Doflamingo is a result of them because he was a World Noble and carried their attitude as a kid. Even when he killed his father and tried to present his head as a peace offering, they refused to take him back due to the choice his father made to leave them. As such, Doflamingo vowed to make them suffer and destroy the world that resulted from their forebears for the slight.
- Movie-exclusive character, Gild Tesoro, suffered from them when they bought a girl he had fallen in love with and found out she had died thanks to them. His ultimate goal was to control the World Nobles through money, which degenerated into aiming to control everyone through money, ironically being not that different from a World Noble himself.
- The newly-promoted Fleet Admiral Sakazuki couldn't bring himself to kill his comrade Kuzan when the two of them had their duel. Kuzan, disgusted of the prospect of being a subordinate of Sakazuki, would later go on to join the Blackbeard Pirates.
- Vegapunk (despite being one of the few benevolent members of the Government), created his six satellites in order to split his ideas and workload; but one of which, York, who represents his greedy side, betrays him by feeding intel about his research to the Five Elders to become a Celestial Dragon and is the main instigator of the Egghead Incident.
- In Puella Magi Madoka Magica The Movie: Rebellion, Kyubey's attempts to restore the old Witch system directly causes Homura's Face–Heel Turn. Homura then becomes something even worse than a witch, usurps Madoka, and sets herself up as a God of Evil so she can prevent Kyubey from trying anything like that ever again.
- Additionally that's also Madoka's fault. Halfway through the movie an Amnesiac God Madoka tells Homura that she would never want to sacrifice herself the way she did in the anime. This causes Homura to believe that Madoka isn't happy in her current position as a God of Good, which drives Homura into creating a world where Madoka can be happy...even if it means becoming an existence that opposes Madoka.
- On a less personal scale, all magical girls will eventually fall to despair and become witches, the very monsters they once fight. This is why Homura opposes Mami: even though Mami's intentions are good, she is unknowingly responsible for the creation of witches Oktavia and Gretchen.
- Ranma ½:
- Ryoga tries to call this on Ranma. According to his version of events, Ranma ran out on the fight between them (after Ryoga made him wait three days), "forcing" Ryoga to follow him... all the way to Jusenkyo, where he was kicked into a Cursed Spring that makes him turn into a harmless little black pig if splashed by cold water... by a certain red-headed girl.
- Mousse and Kuno do the same sort of thing, insisting they only do the things they do because Ranma "stole" the heart of the appropriate girl (Shampoo for Mousse, Akane Tendo and "the pigtailed girl" for Kuno).
- One could argue that Shampoo is a villainess that Ranma created. Yeah, she would probably be just the same if she had never left her village, but Ranma was the one who humiliated her by eating her prize and then effortlessly beating her in battle, so it's his fault she's in Nerima making a nuisance of herself.
- The government in Rave Master decided that the best thing to do with then six-year-old Lucia is to lock him away so he won't follow in his dad and grandfather's criminal footsteps. Being wrongfully imprisoned becomes Lucia's motivation to obliterate said government.
- The Ferals of Sands of Destruction are directly responsible for Morte seeking to destroy the whole world in order to end their reign: she was perfectly content until they wiped out her family. After that, she made it her personal mission to end the world. Considering they have several members of the World Salvation Committee tasked solely with finding her, she's obviously quite the thorn in their side. Compounding this is the fact that most Ferals don't seem to think much about killing anyone who opposes them, particularly humans, meaning those who actually did the killing are probably completely unaware they're the ones who set her off. This doesn't seem to phase her resolve, though: she's just going to kill all of them, as she's convinced that even those who haven't harmed her have probably harmed someone.
- Talentless Nana: In the first chapter, Nana pushes Nanao off a cliff, coldly calling him "the Enemy of Humanity" before watching him fall to his doom. Several chapters later, it's revealed that he survived. Combine the betrayal with experiencing a Trauma Conga Line afterwards, and you have exactly the enemy of humanity that they expected, despite not wanting to be one before. Ironically, by the time this was revealed, Nana had a Heel–Face Turn, so Nanao is basically taking her place as the enemy to the people on the island, and he's much worse than she is.
