History AesopAmnesia / AnimeAndManga

* In ''Manga/DemonSlayerKimetsuNoYaiba'', much later in the series, by the Dimensional Infinity Fortress arc, [[spoiler:Zenitsu has mostly grown to be a heroic demon slayer, determined to do his part without cowering into fear or self-doubt, but for the sake of humor he will snap back, for a brief moment, to his early crying tantrums when he is pain or scared of something]].

----

* Happens in the third arc of ''Literature/{{Bakemonogatari}}''. AnAesop of the second arc was that Senjogouhara needs to be honest with Araragi about what's actually going on, or they're unlikely to make any significant progress in their relationship. But then in the third arc, Araragi lies to Senjogouhara about how he was beaten and mangled by Kanbaru. He then proceeds to keep her uninformed as he takes Kanbaru to Oshino to cure her affliction, even though Senjougahara is the whole reason why Kanbaru attacked him in the first place. [[spoiler:Senjougahara calls him out on this in the climax after Oshino explains to her what's going on.]]

** In the English version of ''Anime/PokemonTheFirstMovie'', [[AnAesop the lesson]] the gang learns is [[IWillFightNoMoreForever "Fighting Is Wrong"]]. For a series based on having Trainers making their Pokémon fight each other until they [[NonLethalKO go unconscious]], this could have been a [[WhamEpisode bold move]], to say the least. However, most likely in the interest of [[CashCowFranchise sixteen more seasons and fifteen additional films (to date)]], the writers decided to have Mewtwo erase everyone's memories of the events on the island and have everyone leave with an overall feeling of happiness and accomplishment. The characters, especially Team Rocket, couldn't recall the important life lessons that they learned. This could be justified as Mewtwo believed it was more important to keep his crew safe from harm. The gang is then seen in the wrap-up montage [[IWillFightSomeMoreForever using their Pokemon to fight each other...]] It wasn't that much better in the Japanese version where the motto is "All Life Is Equal," but at least it didn't come off as entirely hypocritical like it is in the dub.

* ''Manga/FutokuNoGuild'': Hitamu Kyan keeps trying to politely introduce herself to monsters and then challenge them to an honorable duel, no matter how many times they attack her midsentence.

--> '''Ed''': Me too. [[HereWeGoAgain I think we should try to bring mom back.]][[labelnote:Explanation]]Not only did it cost Ed his leg and Al his body(forcing Ed to give an arm to bond Al's soul to the armor, but the brothers discover midway through the story that it's impossible to transmute the dead back to life[[/labelnote]]

* ''LightNovel/TheCircumstancesLeadingToWaltrautesMarriage'': Whenever Jack Elvan goes on a journey, he always packs too lightly, which always leads to him running out of supplies and getting into trouble. Even when people point out what happened the last time he did this, he cannot be convinced to pack more.

* In what's probably a record for "fastest personality reset", after seeing a job well done, the members of the Student Council in ''LightNovel/StudentCouncilsDiscretion'' promise to stop being lazy and actually do the jobs they were elected for. One scene later, everything is back to the status quo.
* In ''[[LightNovel/{{Slayers}} Slayers Revolution]]'', [[spoiler: Rezo the Red Priest is resurrected]] and basically the same crap with the Dark Lord Shabranigdo unfolds due to [[spoiler: his obsession with gaining sight, which he was supposed to have gotten over in his DeathEqualsRedemption of the first series]].

* Happens in the third arc of ''LightNovel/{{Bakemonogatari}}''. AnAesop of the second arc was that Senjogouhara needs to be honest with Araragi about what's actually going on, or they're unlikely to make any significant progress in their relationship. But then in the third arc, Araragi lies to Senjogouhara about how he was beaten and mangled by Kanbaru. He then proceeds to keep her uninformed as he takes Kanbaru to Oshino to cure her affliction, even though Senjougahara is the whole reason why Kanbaru attacked him in the first place. [[spoiler:Senjougahara calls him out on this in the climax after Oshino explains to her what's going on.]]
* Kujo of the ''LightNovel/{{Gosick}}'' anime seems to experience this regularly. He regularly questions whether Victorique really cares for him, agonizes over it, and then comes to the conclusion she does care... only to forget the next mini-arc.

* Just as fast as the ''LightNovel/StudentCouncilsDiscretion'' example, there's one from the ''Anime/TenchiMuyo'' manga. One story has Tsunami, disguised as an old man in a dream, take away Ryoko's tolerance for alcohol as punishment for her glutinous ways breaking the Masaki home bank. And she does this the day before a special drinking-style event. Despite the now incredibly-low tolerance for the drink, Ryoko pushes through and wins the day. Tsunami restores Ryoko's tolerance and gifts her with a lot more sake to drink and Ryoko promises to go easy. The last panel reveals that Ryoko blazed through all of those drinks ''in a month''.

* ''LightNovel/ACertainMagicalIndex'': Touma Kamijou gets into a lot of AccidentalPervert moments. A lot of these could be easily avoided if he would just remember to knock before entering a room. In fact, he asked himself why he didn't do this when he walked in on Orsola Aquinas about to take a shower, but he still keeps forgetting. He could also avoid a lot of his bad luck incidents if he would just watch where he's going and what he says. On a more serious note, while he's always telling the people he saves YouAreNotAlone and that they can always call on him for help, he almost never calls for help himself and tries to solve problems by himself. When people bring it up, he'll say he doesn't want to bother anyone.

* In ''Manga/{{Bakuman}}'', Nanamine tries to climb to the top of Shonen Jump by using a handpicked group of online consultants to help write his manga instead of just listening to his editor. After his plan fails and his consultants desert him, he vows to try again fair and square. A later arc reveals that he lied about this, and instead tries a refined version of his previous strategy, using older and out of work artists as guinea pigs. Since he ends up getting banned from working for Jump after this, there's no chance of him actually larning his lesson.

--> '''Ed''': Me too. [[HereWeGoAgain I think we should try to bring mom back.]]

* ''Anime/PokemonTheSeries'' has [[IdiotHero Ash]], who almost always forgets to not [[LeeroyJenkins blindly rush into things]] and to think his battles through. He also constantly forgets his mistakes, like trying to use Normal or Fighting moves on Ghost Pokémon.

* ''Anime/YuGiOh'': Seto Kaiba seems to be allergic to teamwork despite being able to take down The Big Five's Five-Headed Dragon '''''because''''' of Yugi's help. This is especially bad in the tag duel pitting him and Yugi against Marik's lackeys Lumis and Umbra because even with [[MoralityPet his kid brother Mokuba]] held hostage at that point, Kaiba is still adamant of trying to win the duel himself.

** Takane D. Goodman only wears clothes or armor made from her shadow magic. The problem is whenever her magic gets disrupted in any way or if she gets knocked out, her outfit goes poof, leaving her naked and humiliated. She constantly picks fights with Negi and Asuna, who can easily disrupt her or knock her out. Despite being humiliated again and again, she never learns her lesson to wear regular clothes, or at least underwear. When she and her comrades prepare to join the final battle, she offers to equip her comrades with her shadow armor. They refuse and ask if she's out of her mind because it is so unreliable, but she doesn't understand what the problem is.

* ''Manga/NegimaMagisterNegiMagi'' suffered from two bad cases of this:

* Happens more than once in ''Anime/DigimonXrosWars''. Especially to Kiriha [[spoiler: who will be a changed man actually more than once in the series. Most obvious when Deckerdramon dies and everyone is talking some sense into him. Two episodes later he is acting the same as before]]. The main character Taiki [[spoiler: has to accept later on the fact that he might not be able to save everyone and might have to kill some friends, who are revived after all. But he gets back into the old patterns very soon]].