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Trauma-Induced Amnesia
Sometimes, when somebody goes through a severe, emotionally traumatic experience or suffers a physical head injury, their brain removes the memory of that event; this causes Trauma Induced Amnesia. These memories can be often recovered over time through therapy, magic, or whatever is appropriate in the setting; but sometimes, another traumatic experience will bring them to the surface in Flash Back form. Sometimes depicted as appearing only in Bad Dreams, which often results in Dreaming The Truth. Sometimes, the memories simply come back on their own.

Related to Heroic BSOD. Subtrope of Laser-Guided Amnesia. Frequently occurs as a result of a Heroic Sacrifice.


Examples:

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    Anime and Manga 
  • In Haou Airen, Kurumi gets this, after Hakuron shoots Reilan dead despite her pleas. But Reilan was sorta counting on that.
  • In Macross Frontier, Ranka fits this trope to a T: she saw her family killed by the Vajra, and she promptly forgot all of her life up to that point. Furthermore, when she next meets the Vajra, she starts to have traumatic Flash Backs to the aforementioned event.
    • Used in Macross Plus, though in this case, the traumatizer has the amnesia, as Guld was shocked by his assault on the woman he loved. He kept enough of the memory to falsely blame Isamu, the friend who actually won her heart, for the event... only to have it all crash back on him when he thought he had succeeded in killing Isamu, realising that Myung and Isamu knew it all along and kept the secret to not hurt the three of them further. Then, Redemption Equals Death is the only way to go.
  • A particularly well-done example appears in Elfen Lied, in which Kohta has Trauma Induced Amnesia and an Angst Coma about Lucy killing his father and sister in front of his eyes.
  • Suzaku Kururugi from Code Geass killed his father in a fit of childish and desperate rage, during a discussion about the fate of their country - Genbu wanted to fight Britannia to death, Suzaku disagreed; the trauma from the realization of what had happened caused him to develop amnesia about it. After C.C. accidentally invades his mind to save Lelouch from him, he gets the memories back and is so shaken that he goes into an Heroic BSOD. And Mao uses this to mind rape him again.
    • In the spinoff game Lost Colors, the Featureless Protagonist inflicted this on himself after his Geass caused the downfall of his country and the death of his family, along with making himself Sealed Good in a Can.
  • Neon Genesis Evangelion: Shinji saw his mother Yui die in EVA-01. He might still remember it somewhere deep down, as evidenced by brief flashes of little-Shinji staring through a window at the incomplete Unit 01 (which is off-camera) while trapped inside his Eva after Zeruel. Though the viewpoint might suggest that he may have seen someone else's memories.
  • Princess Tutu did this with not one, but two characters—Rue buries her memories of being Princess Kraehe and having the Raven as her father, putting on a charade for years about only being Rue and being nothing more than a normal human girl. Her memories are all dug up by the end of the first season. Fakir takes a little longer to remember his traumatic past: He watched his parents die as they protected him from crows he had summoned using his writing powers.
  • Casca from Berserk suffers this, along with being driven completely mad, after being brutally raped by Femto during the Eclipse.
  • Vaiya experiences this during MD Geist II: Death Force.
  • Snow girl Yukime from Hell Teacher Nube loses her memories after being tortured to death and then reborn
  • Sasuke Uchiha forgot two things after the massacre of his family. One is that he activated his Sharingan for the first time and chased Itachi. The second is that Itachi was crying before he left Sasuke. He doesn't remember either event until Itachi's death.
    • Same goes for Kakashi. He didn't know that he unlocked the Mangekyo Sharingan after he killed Rin. The sheer shock of killing her likely caused said amnesia. It's even more likely that he even forgot that he killed her
  • A good portion of the clients in Nightmare Inspector have been through something traumatic, thus why they're having nightmares in the first place. Unfortunately, few of them actually remember the event until near the end of the chapter.
  • Usagi aka Sailor Moon does this in the Sailor Stars manga, after Sailor Galaxia kills Mamoru in front of her. She's so traumatised that she blocks the incident out of her mind. Boy, does it hurt when she remembers. (In the anime, she was spared of seeing this since Mamoru got Put On Abus First, and then Galaxia crashed it; she truly had no idea of what had happened, and only realized it upon seeing Mamoru's Star Seed in Galaxia's possession... right after she had killed the Inner Senshi)
    • Mamoru himself was left with amnesia after he survived a car accident that killed his parents. His amnesia is portrayed (mostly) accurately in that he spent some time in a coma before finally waking up, and when he did he could barely remember how to speak let alone anything that happened previously. He's also never fully recovered memories of the event or his younger life.
  • In the Yellow arc of Pokémon Special, Red's Pika suffers this after witnessing his fellow Pokemon getting blasted away and his trainer receiving a direct kick to the stomach from a Hitmonlee.
    • Silver's Sneasel also suffered this right after Silver was kidnapped. Both cases are important because trauma makes it difficult for Yellow and Lance (who both are blessed with special powers) to accurately read their memories.
  • Nina Fortner/ Anna Liebert has forgotten most of the memories of her Trauma Conga Line childhood when she is introduced in Monster. And when she remembers, the effect is devastating enough to get her almost Driven to Suicide.
  • Chapter 10 of Magical Records Lyrical Nanoha Force revealed that Lily's amnesia was due to the trauma of her life as a lab experiment, which caused her memory to deteriorate as she tried to escape her grim reality by retreating into the Happy Place of her mind.
  • In Fullmetal Alchemist, this is the reason why Al can't remember the Gate of Truth.
  • Happens to Ran Mouri in one of the Detective Conan Non serial movies, Captured in her Eyes, after she not only catches a clear view of the murderer, but is almost shot to death by him and the other local Action Girl Satou takes FOUR bullets for her. The victim spends a good part of the movie in an Heroic BSOD, barely able to take care of herself and others, and the trope is lampshaded as her doctor says she might be afraid to recover her memories due to the events that made her go amnesiac. She doesn't recover until the Big Bad tries to kill both her and Conan in exactly the same way; she reacts by loudly declaring her martial arts expertise and curbstomping her rival.
    • Also happens to a teenager named Touma Tachihara in the fifteenth movie (Quarter of Silence). He wakes up after spending eight years in a coma, without any memories of a certain incident; the key to solve the mystery relays on him getting his memories back. It turns out that Touma witnessed a hit-and-run, was kidnapped by the culprit (a friend of his mom), and while trying to escape he fell off a cliff...
  • Kai Hiwatari of Beyblade lost his memory after trying to use Black Dranzer when he was too young led to the destruction of the Abbey. It's not clear if this is due to emotional trauma, or physical trauma from debris.
  • In the manhwa Totally Captivated, Ewon completely forgets a rather important childhood event because of the beating that immediately preceded it, and the hypothermia that immediately followed it - unfortunately for him the violent Hair-Trigger Temper mafia boss who this was also an important event for does remember, and gets fairly pissed off that he doesn't. He eventually remembers after a period of Poor Communication Kills which finally leads to him again almost freezing to death.
  • Tokiko Tsumura of Busou Renkin acquired this at the age of ten after watching a homunculus eat every single person in her school (Quite possibly including her parents, as her family never gets mentioned in the manga) alive, leaving her the only survivor (She managed to hide until she was rescued by Captain Bravo).As a result of this, she blanked out her entire life before waking up in the Alchemic Army's hospital, and never regains those memories.
  • This is what happened to Ganta, where Hagire (as part of his Body Surfing plot) hooked him onto a machine and forced him to witness himself as a child watching his child-hood friend Shiro brutally massacre a room full of science staff when they forced her to use her blood powers on a baby lamb. She lets the lamb live, an obvious Pet the Dog Moment... before her transformation into the monstrous Red Man, who went on a rampage and killed Ganta's school friends years later which him sent to the titular sadistic prison in the first place.
  • Happens to Jeudi from Honoo No Alpen Rose, who suffers this after being the Sole Survivor of a plane crash. The main plot of the series is about her and her boyfriend Lundi trying to make her remember who she truly is.
  • Poor Kuya from Utawarerumono finnaly ended up with this after all the crap she went trought and practicly reverted back to infancy, not even remebering how to speak and only remembereing Hakuro's name. Argubly it was probably the best that could have happened to her.
  • In the Kare Kano manga, Souichiro Arima has repressed almost all of the memories of his early childhood, where he was abused to horrifying degrees by his Evil Matriarch mother Ryouko. (He does know the basic facts due to his relatives, but he himself cannot remember how it happened.) When these traumatising memories start to return, he's already a highschool student... and he pretty much snaps.
  • Murasakiiro No Qualia presents an uncommon variant where said amnesia doesn't happen right after the fact but several years later. To get over her childhood trauma caused by Yukari's Magical Eyes, at least in one of the parallel worlds, Tenjou, sometime in between the last year of middle-school and age 25, chose to re-observe her past and completely forget about those troublesome and traumatic events.
  • Di[e]ce has Naoto, who turns out to have repressed his entire sad backstory. He misremembers/flat-out forgets being shunned by his classmates, abandoned by his father and abused by his mother. He also forgets that his mother attempted suicide and is comatose in the hospital; rather, he seems to have deluded himself into thinking she's recovering. He's shown talking to her on the phone, but in retrospect, she can't have had much to say.
  • One case in the Ace Attorney manga has a variation, in that the person didn't forget the trauma-inducing events, but rather the order they took place in. A young girl named Diana Wheatley was kidnapped a child by a cruel and crazy woman, then saved two days later by her mother, who sadly died two days after that. It turns out that her "kidnapper" was her abusive stepmother, and her "mother" was The Kindnapper, and her real mother. The mother who died was Diana's stepmother, not her real mother, but Diana was so shaken up by the whole event that her memories were completely altered.
  • Lupin III: The Columbus Files: Though it's assumed that Fujiko lost her memories through a concussion caused by the fall, she is often haunted by the image of an ominous-looking hand trying to grab her. At the film's climax, when she finally manages to take Lupin's hand, she breaks through her trauma, causing her to regain her memories.
  • Attack on Titan has a variation concerning repressed and altered memories, brought on by severe trauma. Reiner was unable to cope with the trauma and guilt of his actions as The Mole, and suffers dissociative episodes as a result. During these episodes, he forgets his true identity and past, truly believing he's a human soldier. When he's forced to recognize what is happening, he's deeply shaken.
  • Yogi from Karneval was the only survivor of a nationwide experiment which resulted in complete annihilation of his country and it's citizens. The, by then, 10 year-old prince had to witness the decapitation of his caretakers at the hands of Varuga, was experimented on for an unknown amount of time and once gaining consciousness was strapped to his surgery table and forced to watch a video where his little sister was literary torn to shreds, all while pleading for his help. The trauma caused him to not only develop a Split Personality but made him forget that the event ever took place. When found and saved he had murdered all of the scientists and was brought to Circus to once again be experimented on. He still believes his family is alive, but was told that he couldn't meet them due to the danger of them being targeted

    Comics 
  • One hypothesis about Wolverine's lost childhood memories was that they were too painful to think about so his healing factor suppressed them.
    • Now his daughter/Opposite-Sex Clone X-23 has gone through the same thing, and doesn't even realize she's a mutant when she first turns up in All-New X-Men. She was last seen being rescued by Wolverine from Murderworld and in her very next appearance is being pursued by Purifiers, but what happened in-between has yet to be revealed.

    Fan Fiction 
  • Danny suffers a rather extreme case in the Danny Phantom fanfic "Lost", wherein he doesn't only forget the event, he gets full-blown retrograde amnesia as a combo of head trauma, PTSD, and creating black holes in his brain. He is forced to relive the trauma through real-life psychological flashbacks.
  • In the Hanna Is Not a Boy's Name webcomic Dead of Night, it's implied that this trope is the reason the Detective forgot the first thirty or so years of his life. It was confirmed by Vesser that the memory loss wasn't caused by magical blocks, he had been found post-amnesia with a huge gash on his chest stapled shut, and about a year back, the still-alive Hanna had been trying to find him, telling everyone he'd been kidnapped.

    Film 
  • The Machinist
  • The Blind Side: Michael has this; Sean mentions halfway through the movie about how "Michael's gift is his ability to forget" his Dark and Troubled Past, and near the end, Michael explains how he would "close his eyes" when bad things happened.
  • The cult sci-fi movie K-PAX contains one of these as part of The Reveal, though like everything else in the film, it's a bit more complicated than just that.
  • The Bourne Series (like the novels) is based around this concept. In the movies Jason Bourne fails to kill his target because there are young children present (and he knows he would have to kill them too). He is then shot and left for dead. He awakens with no memory of who he is or that he is an assassin.
  • The Long Kiss Goodnight: The main character has no memories prior to waking up, badly injured, on a beach seven years ago. After a car accident, she discovers that she's VERY good with knives, and other pieces of her past begin to come back. She gets all her memories back after she's tortured and almost drowned.
  • This is the inciting incident for the domestic drama Regarding Henry, starring Harrison Ford. In it, the title character survives a gunshot wound to the head, only for the resulting pinched artery to affect his memory. Cue the rest of the movie depicting him coming to terms with not remembering anything about his life before the shot.
  • Jeanne, the protagonist of Dont Look Back, is unable to remember anything about her life prior to a traumatic car crash when she was 8 years old.
  • The titular hero of RoboCop (1987), who was brutally murdered by a gang of criminals who finished him off with a single shot to the head. Despite suffering brain damage and being medically dead for a long time, he begins to regain his lost memories over time after being revived as as a law-enforcing cyborg. note 

    Literature 
  • In Lois McMaster Bujold's Mirror Dance, Miles Vorkosigan suffers from amnesia after being killed, frozen, and then revived.
    • This is more of a subversion, since the amnesia is the result of a medical procedure, rather than emotional stress or obvious brain trauma.
  • In the Cal Leandros series, Cal was kidnapped by the Auphe when he was fourteen and dragged through a portal to their home world/dimension/whatever. When he escaped, he had no memory of what went on during those two years. Darkling mentioned that it involved torture and learning how to open portals in preparation for the Auphes' plan to destroy humanity.
  • In Animorphs, Rachel loses her memory after being mobbed in bald eagle morph by a group of rowdy crows and slamming into a tree.
  • In "See Jane Run" - a psychological thriller by Joy Fielding - the very first thing we read is how main heroine Jane Whittaker forgets who she is on her way shopping. And what the hell are those blood stains on her clothes and this large sum of money in her pocket?!
  • While we've never seen the cause, the Duck Man from Discworld may suffer from this. His occasional, vague musings about life before he became a beggar suggest that something quite nasty happened in his past.
  • Cole has this in the last episodeTracker. An imbalance in his life force containment device was triggered by having captured only one of a set of alien twins, and Cole was basically given a nasty electric shock that wiped out his memory.
  • Induced deliberately in Caliban. Kresh figures out who attacked Doctor Leving when he realized that it wasn't a failed murder attempt that resulted in her being unable to remember much about the evening in which it happened, but a calculated assault to make her forget what she had been doing at the time of the attack.

    Live-Action TV 
  • The first season of 24 had this happen to Teri as blatantly obvious padding. After escaping the terrorists who held them hostage, Teri tells Kim to stay in the car while she figures out where they are. Car goes over the side of the embankment and explodes, Teri collapses, and wakes up with no memory of who she is.
  • Claire on LOST lost her memory of her kidnapping by Ethan and the Others, requiring hypnosis to recall some details.
  • The Eighth Doctor of Doctor Who suffered from this in his only onscreen appearance and spends a good fourth of the movie recovering from it slowly. Of course, returning from the dead several hours after one has died apparently does that to you, even if it's not unusual for the Doctor.
    • And he does it again in the spinoff novels, after he destroys Gallifrey (the first time, not the time that the Ninth Doctor spends his tenure angsting about). Oddly, he never really gets his memory back.
      • It finally gets revealed that it's not trauma-induced at all; as he points out, he didn't get it when he was destroying entire universes. In fact, he suffers amnesia because he's storing the entire Matrix in his mind, ready to recreate Gallifrey.
    • Also, in "The Next Doctor," the guy who thinks he's The Doctor isn't actually a future regeneration: Applied Phlebotinum gave him some of the Doctor's memories, while personal tragedy made him forget his own. The Doctor refers to it as a fugue state.
  • Firefly's River Tam is implied to suffer a strong case of this from her time at the Academy.
  • This happens at least twice in Mash with Hawkeye. In one episode, he incorrectly remembers a friend of his pulling him out of a lake to save him from drowning. Hawkeye had suppressed the memory that his friend had actually pushed him in before he saved him. In the final episode, Hawkeye had another problem with recalling his memories when Hawkeye remembers that he had inadvertently contributed to the death of a baby on a bus in enemy territory.
    • There were others. In one, Sidney is brought in after a soldier comes in with no memory of who he was. After hypnotizing him and recreating the battle he was in with help from Hawkeye and BJ, we discover the soldier's younger brother was killed in the battle.
    • Another dealt with a soldier who claimed to be Jesus Christ. Sidney AND Col. Flagg are brought in to find out who he was.
  • Played for comedy, in Dinosaurs Earl and Fran suffered so much from their experiences with their two oldest kids while they are two, that they had blocked out the entire year.
  • In the Korean Series Winter Sonata, Kang Joon Sang gets hit by a bus at age 18 and loses his memory, only to have it return 10 years later when he gets hit by a bus a second time.
  • In an episode of The Twilight Zone a woman has repressed memories of, as a child, being burned and witnessing a criminal killing her mother - When she gains her memories back, she realizes that a male visitor is the criminal and that he is trying to kill her.
  • The eponymous character of Dexter blocked out the memory of witnessing his mother's gruesome murder as a very young child, which was apparently so traumatic that it still turned him into a serial killer even though he didn't remember it until towards the end of season one of the series.
  • In Sharpe's Peril, Henry Simmerson loses his memory after being strung up naked in the Indian sun. It actually makes him a nicer person, compared to the arrogant bastard he was before, to the point he's even seen playing pat-a-cake with a young Indian girl.
  • In the season 9 premiere of NCIS Tony is shot and cannot remember what happened. A psychologist talks his through the preceding events until he can remember who shot him.
  • Similar to the above example, in the mid-season finale of the second season of White Collar, Mozzie is shot and later cannot remember anything about the shooting.
    • It's worse for him because he has perfect recall, so not being able to remember something would be pretty jarring.
  • In the season 4 premiere of Castle after being shot Beckett tells Castle that she does not remember anything about the shooting. She remembers everything but does not want to deal with his Love Confession.
  • A key part of the crime drama Unforgettable. The female lead has absolute perfect memory, but there's one day she cannot remember: the day her sister was murdered. She's convinced that if she can recover her memories of finding Rachel's body, she'll discover a clue as to who killed her.
  • Highlander: The Series episode "Through A Glass Darkly": An Immortal has a kind of mental meltdown in which he takes his student's head and the trauma triggers amnesia and a Fugue State.
    • Episode "Patient Number 7": An Immortal woke up in a mental hospital with no memory of who or what she is, or why the police and armed thugs are chasing her. Her trauma was when the thugs murdered her husband right in front of her.
  • Season 4 of Tinsel has Fred Ade-Williams suffering from Missing Time because of this.
  • In the NBC series Awake, Detective Britten cannot remember what happened before the car accident that killed either his wife or son, depending on which reality he's in.
  • Sherlock episode The Hounds of Baskerville has Henry Knight claiming he watched his father being savaged by a hound when he was a young boy. It turns out that he actually watched his father being murdered by a scientist while under the effects of a hallucinogenic chemical; the 'hound' was something his mind created to cope with the trauma.
  • A favorite trope of soap operas, with the most famous example being with General Hospital's Jason Quartermaine, who never regained the memories of his old life before the car accident that caused his head injury.
  • Forever Knight "Night In Question" has Nick losing his memory after a shot to the head. It also makes him forget he's a vampire for a while.

    Radio 
  • Riders Radio Theater's "Phantom of the Valley" arc involves Ranger Doug losing his memory and believing himself to be a Zorro Expy after awakening in said Expy's lair.

    Video Games 
  • Used by the player character Daniel in Amnesia: The Dark Descent, hence the name. He writes a note to himself prior to taking a drug which causes him to lose his memory, and as you play the game you begin to learn why he did it He opened up a Sealed Evil in a Can and then in an attempt to remove the curse placed on him, he ended up helping a guy kill those whom he thought were criminals and murderers. Except it turns out to be innocent people he may have been slaughtering.
  • In Final Fantasy VII, Cloud Strife suffers a perfectly understandable case of Trauma-Induced Amnesia, considering the incredible Trauma Conga Line he suffers before the game even starts.
    • As a kid, he'd hoped to join the SOLDIERs but didn't end up strong enough. So he joined the regular military, befriending SOLDIERs Zack and Sephiroth. The three of them are sent to check up on something in Cloud's hometown... when Sephiroth finally figures out why he and his friends are so different from everyone else, and why he had to help kill them. Sephiroth handles it well. Cloud and Zack manage to defeat Sephiroth, but only after all but one villager is butchered, the village is set on fire, and Cloud and Zack themselves are mortally wounded.
    • As their reward, the two of them get nabbed up by the military's local Mad Scientist and experimented on. Zack doesn't break through the sedatives for years, and after he breaks both of them out, Cloud is horribly poisoned by the experimentation and comatose. Zack spends days if not weeks or months carrying Cloud around, telling him about himself, his past, and his goals, trying to get him to revive. When the two of them are finally cornered by the army, who have been told that they're dangerous, Zack walks away after hiding Cloud, so as to confront the military head-on. Alone. A brilliant plan. Not that he had much of a choice. Cloud's first movement on his own is weakly reaching one hand for Zack, unseen, as Zack walks away. By nightfall, Cloud's managed to get to his feet... and finds Zack where he was left alone to bleed to death, in time for Zack to give him his sword.
    • Between the trauma, the experimentation, the coma, the talk during a vulnerable and suggestible state, and now more trauma... by the time Cloud reaches the nearest city, he still remembers his childhood, but thinks Zack's adulthood and career was his own, can't remember half of what happened for the massacre at home (and thinks he was Zack for the other half), and isn't even quite sure why he's at this city again.
      • He was injected with a large amount of Jenova cells during the experiments. Jenova, being The Virus, tends to have nasty effects on a person's body and mind. The only plus side to all this was that the experiments weren't all that different from the process used to create a SOLDIER, meaning Cloud now had the skills and abilities of a SOLDIER 1st Class that he claims to be.
  • In Tales of the Abyss, Luke has Trauma-Induced Amnesia from a kidnapping seven years ago that wiped out all of his memories of the event — as well as all memories of events prior to the kidnapping — while Guy has amnesia about the death of his family. In Luke's case it's subverted once it turns out that the Luke that got kidnapped wasn't the one his family got back — and the recovered one didn't exist prior to the kidnapping.
  • The PC of Gene Forge 5 has this, from what information the player is able to gather. Many significant NPC's from throughout the series claim to vaguely recognize you, and new characters describe your past behavior from senseless rage to Super Power Meltdown. Though speculation is rampant, the true identity is only answered by the Shrug of God. Maybe it's just a device to justify re-explaining everything previous players should know, but new players wouldn't, and explain why the PC wouldn't have any defined relationship to previously famous NPC's.
  • This happened to Shadow the Hedgehog in the Sonic the Hedgehog series following his apparent death in Sonic Adventure 2, when he fell after teleporting Space Colony A.R.K. back into a stable orbit. Understandable, as there was presumably head trauma involved. Apparently, the robot Eggman used to stop Shadow's fall was a bit clumsy. His quest in the next two games was to regain his lost memories. Poor Shadow, since he had only overridden the fake memory intended to make him destroy the world a few minutes prior to his apparent death.
  • Xenosaga: Shion saw both her parents being killed in front of her eyes, and then she resonated with the Zohar, calling the Gnosis and basically destroyed an entire planet... so she blocked all the memory from her childhood and that event.
  • In Silent Hill 2, the protagonist has this caused by his guilt over killing his wife, even though it was a a Mercy Killing.
  • Oichi from Sengoku Basara. It's revealed that after her husband Nagamasa was murdered before her eyes by her brother, she went crazy and was enslaved by her dark powers, which made her forget it all. By the third game, she's basically a blank slate.
  • Ventus of Kingdom Hearts: Birth by Sleep. You'd forget stuff too if someone you thought you could trust caused you to get beaten into unconciousness, then quite literally cut your heart in half.
  • Invoked in Golden Sun. The antagonists decide the memory of their crimes out of the witnesses.
  • In Trails In The Sky, Joshua seems to be suffering from this, though nobody can figure out why. It's due to the fact that he doesn't want to remember that he, himself is the one who brutally murdered his own family, though not entirely of his own will.
  • May be a factor in why the PlayerCharacters of Knights of the Old Republic aren't going to say anything about their pasts. Malak's attack left Revan very close to death, and the Exile's been through so much War Is Hell that the only way to stay halfway sane would be to spend the last decade working on forgetting.
  • In Heavenly Sword, Kai is repressing the memory of her mother's murder at the hands of Flying Fox, until she is forced to remember. To elaborate, being forced to remember in this case consists of Flying Fox actually putting Kai's mother's emaciated corpse on display, knowing that Kai will discover it.
  • Ashley Riot, protagonist of Vagrant Story, begins the game believing that he once had a wife and son who were murdered by thugs at a family picnic, but Manipulative Bastard Sydney proposes an alternate theory: Ashley murdered an innocent woman and her child during the course of his duties as a soldier, and through a combination of this trope and military brainwashing, convinced himself they were his family to help himself cope with the grief. The game's writers deliberately left it vague as to which version of his backstory is correct.
  • Some of the events of Assassin's Creed II have been supressed in Ezio's memories, and only become available to Desmond in Brotherhood when he has achieved a greater level of sync. These memories include giving a Viking Funeral to his father and brothers after their execution, finding out his girlfriend Christina has left him for another man and delivering an If You Ever Do Anything to Hurt Her... speech to her new fiance, getting snubbed after trying to reignite his love for Christina during the Venezia carnival, and Christina dying in his arms after being attacked during the bonfire of the vanities.
  • In Skyrim, a priestess from a cult of cannibals claims that the Dovahkiin lost a sibling when they were a child, and took a bite out of the corpse out of curiosity, making the two of them Not So Different. If the Dovahkiin denies any knowledge of this event, she claims that most people block out the memories of their first incident of cannibalism out of revulsion. Whether or not she's telling the truth is left up to the player to decide.
  • Quantum Conundrum has this with Professor Quadwrangle. Thankfully, the only thing he forgot is what went wrong during his experiment and how he got stranded in a pocket dimension.
  • In the Dating Sim Always Remember Me, a car accident involving a drunk driver is the Relationship Reset Button that comes between the Official Couple. This jump starts the plot, driving the protagonist to either nurse her Amnesiac Lover back to health, or to pursue other eligible bachelors.
  • In Metal Gear Solid 2, the protagonist Raiden only finds out near the end of the game that he's a former child soldier, which he has repressed his memories of.
  • In Persona 4, people who are abducted then tossed into the TV world often can't remember how they got there in the first place, mostly due to stress and exhaustionnote .
    • In P4 Golden the good ending reveals that Nanako (the protagonists younger cousin\surrogate little sister) remembers almost nothing from either her kidnapping or her time in the TV world, only that Big Bro and his friends had saved her from something. Naoto voices the opinion that this is probably for the best.

    Visual Novels 
  • Onisarashi-hen arc of Higurashi no Naku Koro ni. Actually, the manga version of Onikakushi-hen has this too. That is, until Keiichi notices his room...
  • It turns out that Umineko no Naku Koro ni's entire plot revolves around this trope, since the entire series is essentially Battler remembering his past through testimonies and theories in the future.
  • Ace Attorney: This was the given reason why Ema's and Edgeworth's respective memories of SL-9 and DL-6 were incredibly foggy and incomplete. Of, course, in Edgeworth's case it turns out that the only thing he really forgot was throwing a gun. He was unconscious for all of the remaining time.
    • This trope returns in Dual Destinies, this time affecting Athena Cykes. Like in the above examples with Ema and Edgeworth, this amnesia allows her to be accused of committing the crime she has blocked out from her memory — in this case, the murder of Athena's mother.
  • Shirou of Fate/stay night, Heaven's Feel route: erases all his memories of Saber due to his crushing guilt at killing her (though she was corrupted at the time).
    • Even before that, Shirou has no memory of his life before the Fuyuki City fire. His first memory is of Kiritsugu pulling him out of the flames.
  • Yuuichi from Kanon forgot nearly everything about the town where Nayuki lived in because he witnessed, and believes he's responsible for, Ayu falling off a tree and her resulting coma. This drives the plot, by the way.
  • Komari from Little Busters went through this after her brother died due to him convincing her that it was all a dream. As a result she repressed the memories of him, though they still affect her dreams. The memories can be triggered into returning when she sees blood or death, but this causes her to Heroic BSOD all over again and then, after a day or two, attempt to recover by pretending someone else is her brother and repressing everything all over again. In the end, Riki is able to break the cycle, forcing Komari to accept the reality of his death and allowing her to grieve over it naturally.

    Webcomics 
  • Amity of Miamaska suffers from this after hitting her head on the ground from a fall.
  • Partially trauma induced and partially because she was just too young, Fiona from YU+ME: dream initially does not remember how or why her mother died.

  • Mituna Captor from Webcomic/Homestuck lost his mind, as a result of an implied Heroic Sacrifice. Ironically, he can't remember what the event was due to the event.

    Web Original 

    Western Animation 
  • Naturally, The Simpsons has a few examples.
    • In one episode, Homer is hypnotized, which triggers his memory of finding a dead body in the old swimming hole.
  • Helga Pataki of Hey Arnold! suffers from this in the episode "Beaned" when she's struck by a baseball hit by old 'Dangerous Lumber' himself, Arnold. After waking up fully recovered the next morning, Helga continues faking her amnesia to guilt-trip Arnold into taking care of her, but begins to feel sorry for forcing him to pay attention to her. She fakes another head injury which 'cures' her amnesia and uses her usual crabby bluster to try and put some distance between them, but is pleasantly surprised that he still wants to make sure she's okay.
  • Played for laughs with the eponymous Archer in the episode "Fugue and Riffs." The trauma: Mallory got married.

    Real Life 
  • Truth in Television, at least as far as physical trauma (especially to the head) is concerned. Global amnesia is a very real phenomenon that affects people who have been in car accidents & similar traumatic incidents. On the end of emotional or psychological trauma, there is vigorous debate to what extent it occurs, but dissociative disorders - particularly dissociative amnesia - are what this trope is based off of.
    • It falls under a category called 'Motivated Forgetting'. It is divided into two categories - repression and suppression. Repression is the Sigmund Freud style "it's too hurtful to remember so your subconscious buries it" stuff, and suppression is when you actively try to forget something. Repression has a little bit of evidence in that child abuse victims often can not recall the abuse later in life. Suppression can also occur to a certain degree, wherein people who concentrate on forgetting something are less likely to be able to recall it at a later time when asked to do so.
    • It may not really count as forgetting, but shocking events which take a very short time to happen sometimes simply don't register in the brain in the first place; this can happen to road accident victims or similar. A head injury that results in immediate unconsciousness is virtually never recalled afterwards, because the same trauma that forces the brain to interrupt consciousness also interrupts the process of memory storage.
    • Dissociative amnesia, dissociative fugue disordernote , and dissociative identity disorder note  are the most extreme cases. Of course debate rages on as to how many true or planted examples there have been, but theoretically the brain is malleable enough when young so that if you experience emotional trauma as a very small child, your mind can protect itself by "pushing away" the memories, believing it didn't happen or it happened to someone else. But even if you don't remember it, it's still there. The brain can protect itself from immediate damage by blocking out the harmful memories themselves, but the trauma will always find some other way to manifest itself until it's dealt with
  • When he was a boy, Stephen King saw a friend hit by a train; he claims to have no memory of the incident.
  • Some sources say that this trope is completely false, that traumatic events can't be forgotten. Ever.
  • The sources that tend to assert that emotionally and psychologically traumatic events can't be forgotten (Ever) tend to be technically correct, in the adrenaline and heightened stimulus response in the hippocampus and parahippocampus of the brain tend to embed traumatic events more strongly in an individual's memory. However, that said, this trope does occur regularly and this is why: although the event itself cannot be forgotten, the mind will deliberately sublimate and repress the traumatic memory in order to try to retain a degree of emotional and mental stability in the case where an even would be traumatic enough to instigate a dissociative fugue. Many victims of violence, particularly sexual violence as children, will not remember the events until either a trigger brings back the suppressed memory or the memory suppression eventually resolves itself as the mind starts to deal with and handle the trauma (usually when the individual is an adult and emotionally stable enough to deal with it) - the memory often starting to re-appear through dreams or nightmares. Usually in these cases, there will be a generalised dissociative state immediately following the traumatic event, and some changes in behaviour or personality may be noticed over the short term.
    • One question that is asked of people being assessed for PTSD is whether or not they're unable to remember a significant part of a traumatic event. For those who are, they'll be able to remember a great deal of what traumatized them in horrifying detail with the exception of a portion of what happened to them.
  • Holocaust Survivor Zoltan Zinn Collis, who was saved from Bergin Belsen concentration camp at the age of five, claims to remember atrocities, but to have no memory of his own emotional response to them at the time.


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