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Love Makes You Evil

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The love story that enslaved a galaxy.

"I feel like we hear the phrase "love and justice" a lot, but no one seems to ever mention "love and evil". An evil guy whose love is deeper than the ocean. If the object of affection is narrowed down to Celty, then I am one. If it's for the love between Celty and me, I'm pretty sure I can become as bad as bad can be. "
Shinra, Durarara!!

The Power of Love ain't always a good thing.

How many times have we heard this? "I did this for you! So we could be happy together!" Love can be a strong motivation for good. But if you're in a Love Triangle, or your loved one is dying of cancer, it can also be a great motivation for murdering the hypotenuse, making a Face–Heel Turn, embracing The Dark Side, selling your soul to the devil, raping your love interest, or cursing yourself by opening the Tome of Eldritch Lore, up to causing The End of the World as We Know It. And if that person should die, they are willing to go to horrific lengths to bring them back.

This often happens when a simple love spirals into a dangerous obsession; the love goes out of control, becoming their number-one motivation beyond everything else, including their reason, morals and others' well-being, and they self-destruct in the end. A common, yet, severe manifestation of this is usually cries of "If I Can't Have You... Then No One Will." If both lovers follow the downward spiral, you may end up with Outlaw Couple or Unholy Matrimony.

Sometimes, it's not quite "love" but the lack thereof that drives a rejected suitor to serve the Big Bad for revenge. The object of their affections will probably think whatever damage they cause is All My Fault.

Sometimes, the person who will go to extreme, evil lengths for love is a villainous Stalker with a Crush who has no grasp of the true concept of love, and emulates it as best he can. With knives.

Sometimes, it's a genuinely well-meaning, severely Genre Blind Love Martyr who wants their beloved to be happy or protect them from their enemies, even if it means damning themselves in the process. They will hear endless rants of What Were You Thinking? before breaking out in cries of My God, What Have I Done? and dying nobly, using their last breath to assure their beloved, "I still love you. I always will love you."

Frequently, the motivation for the sympathetic Fallen Hero to fall. The belief that, had he been a little less lenient, a little less forgiving, that special someone who was Stuffed In A Fridge might still be alive. Leads into Well-Intentioned Extremist territory.

An especially unpleasant extent of how Love Hurts and Makes You Crazy. Might start with, or end in, Destructive Romance. Since this is both a Love Trope and a Betrayal Trope, there will be spoilers. See Yandere for a version of this trope that is mixed with, or camouflaged by, Moe tropes. If the character who is in love was evil before falling in love, it's a Villainous Crush. Contrast Evil Virtues, where a villain has love as a good trait, or Love Is a Weakness, where a (usually villainous) character avoids love for fear it will spoil them.


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  • Onigumo from InuYasha was already pretty damn evil before he met Kikyou, but it was his desire for her that prompted him to sacrifice himself to a horde of youkai and become Naraku, the Big Bad of the series, who is much, much worse than Onigumo was as a human, considering the vestigial trait of Onigumo's potential to feel guilt and empathy an unacceptable weakness to be purged from himself.
  • Mazinger Z: Dr. Hell fits the trope to the letter. He was psychologically unstable before... but when he fell in love with a cute Japanese student attended his college he became obsessive, jealous (he even fumed if she spent time with someone else) and erratic. When he found she was in love with someone else, his mind finally snapped out completely. He thought everyone was out to get him, and attempted to Murder the Hypotenuse (he stormed into the campus with a shotgun!). That incident (and another more where he tried to help someone and he got the crap beaten out of him for it) were his Start of Darkness. He decided Humans Are Bastards and he would make everyone pay. People had shunned him out of scorn or indifference before, but from that day they gave him a wide berth out of fear because he already started looking Obviously Evil (and downright creepy).
  • Ranma ˝ makes quite a heavy use of this, for a comedy series. Shampoo wants Ranma to return her love, so she tries to use Love Potions on him and has no qualms about contemplating Murder the Hypotenuse, though she only actually attacks her rivals if she's convinced she can do so without hurting her reputation. Ukyo Kuonji can be just as bad as Shampoo in the manga, but still keeps some trace of this in the anime. Mousse is the most common offender of attempted Murder the Hypotenuse due to his unrequited love for Shampoo. Ryoga Hibiki abuses his curse to take advantage of Akane Tendo's naivete due to his obsessive crush on her, at least once tried to use a Love Potion on her, once contemplated living together with her in a haunted cave forever so she would always want to cling to him for protection, and once tried to murder his rival for her hand — while his direct motivation was to make Ranma Saotome stop hitting on him (having accidentally got him with the aforementioned Love Potion), he openly recognized that killing Ranma would leave him with Akane by default.
  • Gendo Ikari from Neon Genesis Evangelion takes the phrase 'you're worth the world to me' to its (insanely) logical conclusion. He tries to bring about the apocalypse, in fervent belief that this will reunite his mind and soul with that of his wife, Yui. Technically, while the plan actually began working, Yui's soul rejected Gendo's at the climax, due to the untold suffering he brought, especially to their son. The moment is best summed up when the Eva her soul is in bites Gendo and Gendo's last words are an apology to his son.
  • Rido from Vampire Knight after 3000 years of Unrequited Love for his sister Juri who married their other brother Haruka instead, kills both of his siblings and tries to live out his incestuous feelings with his niece Kuran Yuki.
  • Chikane Himemiya from Kannazuki no Miko does this to the point of violating her friend. This is all so that her friend will be willing to kill her. This is because she is guilty over killing that same friend in a past life where they were lovers.
  • Lelouch vi Britannia in Code Geass. Lelouch seems to be rather affectionate towards his sisters. Lelouch often dotes on her and promises that he'll create a better world for her... which essentially means manipulating, blackmailing, sacrificing, and disposing whomever he wishes to ensure that his rebellion in Japan achieves a violent revolution against the Holy Britannian Empire.
    • There's also the Alternative Character Interpretation saying that Lelouch's love for his sister is the only thing keeping him good and if he didn't have her he would take the step from morally ambiguous Anti-Hero to ruthless Villain Protagonist.
      • Another more explicit example happens with Suzaku Kururugi. When he first appeared, he was a Knight in Shining Armor who later falls in love with princess Euphemia, but when she dies he pretty much ventures into Anti-Villain territory.
      • In R2. An episode after Lelouch and Shirley officially become boyfriend-girlfriend, she gets killed by Rolo. Lelouch then goes on a Roaring Rampage of Revenge against the Geass cult (which involved him slaughtering a lot of noncombatants) that sets off a series of events that leads to Zero's identity being exposed and him being betrayed/abandoned by the Black Knights.
      • Also Rolo's own psychotic love for Lelouch, the first person who was kind to him ever, prompted him to kill Shirley (aside of her mentioning something she should've NOT even known of), to wish he could kill Nunners... and to die for Lelouch after he's abandoned by the Black Knights.
      • And not to be outdone, Rolo's master V.V, who kills his sister-in-law Marianne out of jealousy and psychotic devotion to his beloved brother Charles.
      • If we go to parental love, then Charles and Marianne fit in to a T. They not only were as much in love with each other as persons like them could be, but they were willing to bring up The End of the World as We Know It and horribly traumatize Lelouch and Nunnally, if this allowed them to create a world where (according to them) their children would be happy.
      • Also, little Nina Einstein's obsessive love for Euphemia made her go bonkers once poor Euphie was gunned down. She remained nuts (and her madness was further encouraged by Schneizel and his More Than Mind Control) until at least the second half of R2. Nina's final redemption can best be described as "How I Learned To Stop Worrying And Hate The Bomb".
      • Mao's psychotic devotion to C.C may be a more conventional case of Love Makes You Crazy, but if Nina counts as this trope, he would too.
      • And finally, this was the main reason Lelouch did not respond to Kallen in the last few episodes of R2 even after she kissed him, as he knew that if he told her he loved her (whether true or not) that she would turn against the Black Knights and the rest of the world to follow him. And by "follow him", I don't mean just supporting him in the coming battle; she would have willingly died with him. That said, this is more a case of "Love Makes You Support Evil", but it still counts.
  • In Gankutsuou, being on the losing end of a Love Triangle with his childhood bestfriends Mercedes and Edmond, causes Fernand's Start of Darkness, which he blamed in large part on the fact that he was still poor and struggling while Edmond was already rich and successful.
  • This trope spawns Judai's Stalker with a Crush (Yubel) and all the problems in Season 3 of Yu-Gi-Oh! GX.
    • Yu-Gi-Oh!: While we're in that neck of the woods, we shouldn't forget Pegasus and his dead wife.
    • And of course Carly in 5D's. So evil that she claims that she became a Dark Signer just so she could kill Jack and they could be together. Thought technically, not so much evil as suffering from a bad case of Brainwashed and Crazy, coupled with a Superpowered Evil Side.
  • Sailor Moon: Uranus and Neptune surrender to Galaxia, willing to be Brainwashed and Crazy as long as they're together. To their credit, they plan on overthrowing her — it just doesn't work out that way.
    • The most outright example, however, is Queen Beryl and her obsessive love for Mamoru aka Tuxedo Kamen aka Endymion in the first season. Fiore also goes the route of the villain to get at Mamoru in the R movie. Another one would be Katzy/Cooan in R and her own love for Rubeus. Also Zoicite, despite being already evil anyway, does most of his evil to please his boyfriend Kunzite, who then goes a little Ax-Crazy to avenge Zoi's death.
    • And in Pretty Guardian Sailor Moon, Sailor Moon loves Tuxedo Mask so much that she's willing to destroy the world for him. And does. Twice.
    • And that's not mentioning Prince Dimande's little obsession with Serenity. Of course, he ended up sacrificing himself to save her from Wiseman which may point out that underneath the whole trying-to-destroy-Earth-for-revenge thing, he's not all-together a terrible person... Sort of.
      • That's only in the anime. In the manga he tries to kill her.
    • Codename: Sailor V, of which Sailor Moon is the More Popular Spinoff, has Danburite, the Big Bad himself: everything he did was out of love for Sailor Venus herself.
  • A common theme in the second half of Mai-HiME, which claimed more than its fair share of characters:
    • Shiho (out of her love for Yuuichi and jealousy of Mai for what she thought was an attempt to take it away, uses her Child, Yatagarasu, to attack Mai several times, eventually forcing her into a battle in which Yuuichi will die if either wins. She is also at least partially responsible for the death of Akira's child, and thus, Mai's younger brother Takumi.)
    • Shizuru (out of her love for Natsuki, goes insane when she believes Natsuki has rejected her (Natsuki, however, also considers Shizuru her most important person) and kills those she sees as Natsuki's enemies.)
    • Mikoto (out of her love for her brother, whom a few other characters eventually learn is the Big Bad, ends up becoming Brainwashed into doing his bidding.)
    • Yukariko (out of her love for Ishigami, the art teacher who had forced her to fight the other HiME against her will.)
      • In the manga, Shiho's desire to be with Yuuichi leads to her coming to the school as part of the Searrs takeover and fighting against Mai. Similarly, Alyssa's loyalty to her mother Saeko Kuga causes her to go along with her plans.
  • Nina in Mai-Otome She not only loves, but is in love with her adoptive father Sergay, who works for Nagi dai Artai. Seeing that Sergay is Arika's Anonymous Benefactor pushes her over the edge, unlocking the power of Nagi's Ultimate Black Diamond. She attacks Arika in a rage, but kills Erstin instead when Erstin has her Slave protect Arika. She works to further Nagi's plans, first to prevent him from punishing Sergay for withholding information and later uses the Harmonium in order to keep Sergay alive after Nagi shoots him, and is partly motivated by a belief that she can no longer turn back.
    • Also Tomoe, who is obsessively in love with Shizuru. She plots against Arika, trying to get her expelled, killed or otherwise unable to get between her and Shizuru, and later joins Nagi's Valkyrie unit so she can essentially have Shizuru for herself.
  • Shin from Fist of the North Star kidnapped the protagonist's fiancée, Yuria, and became a wasteland overlord in his attempt to win her love. Later in the same series, Souther is revealed to be enslaving children to build him a giant pyramid all for the sake of his beloved master, who he had been tricked into killing. In the end Ken declares that Souther was the one who loved the most of all.
  • An odd case with Subaru from Tokyo Babylon and X/1999 in that it's his one wish for his lover, Seishirou, to kill him and not anything outright evil, though his death could help cause the destruction of the planet. Their final battle culminates in Seishirou pulling off his own Thanatos Gambit and having Subaru kill him. Afterwards, plays a bit straighter when Subaru accepts becoming the next Sakurazukamori, and replace Seishirou as a Dragon of Earth in order to help Kamui realize his "true wish".
    • Arashi is an example of a well-meaning one, performing a Face–Heel Turn to save her love interest, Sorata, who's destined to sacrifice his life for her.
    • We also have Kanoe, who wants to free her older sister Hinoto from her obligations as the leaderess of the Dragons of Heaven, which give her enormous Psychic Powers but render her crippled, blind and deaf/mute. If she has to destroy the world to release the person she loves the most from such a cruel burden, she will.
  • The Twelve Kingdoms is a notable example in that there don't seem to be any romantic interests that actually end well (maybe because sex isn't a requirement for reproduction in that world?). UST throws jealousy fuel on the drama fire for the mains, and all the rulers shown so far that take consorts end up screwing up tremendously (and one queen's unrequited love for her partner ki-rin leads her to drive all women out of her kingdom).
  • Brain Powerd, one of the more recent Yoshiyuki Tomino anime, pulls this off not with romantic love, but with motherly love. Captain Anoha McCormick, leader of the Novice Noah finds out much to her dismay that her son Jonathan has joined the Reclaimers out of bitterness for feeling neglected by his mother as he was growing up. This leads her to fall into a deep depression over her failure as a parent, and to later actually join the Reclaimers herself under the alias of Baron Maximillian, using a Char Aznable-sque mask and a bulky body armor (not to mention a voice synthesizer) to hide her true identity. She then starts working for the same goal she had until then opposed: to guide Orphan through the atmosphere and into space in order to fulfill Jonathan's (and the Reclaimers') Social Darwinist wishes. She doesn't care that Orphan's emergence will cause The End of the World as We Know It, because she's now too obsessed with realizing her son's twisted ideals and somehow make up for her parental mistakes.
  • Psycho Electro Precia Testarossa of Magical Girl Lyrical Nanoha, in regards to parental love, is one of the most spectacular cases ever. As the Alicia in Fate's dream put it:
    Alicia: She was a really kind person. Because she was so kind, she broke while trying to revive me after I died...
  • A few in Magic Knight Rayearth:
    • The sorceress Alcyone gave only one reason for betraying Cephiro: she loves Big Bad Zagato. Never mind that his actions could cause Cephiro's destruction. In the second season of the anime, she joins the new Big Bad to hasten Cephiro's destruction because Zagato rejected her. And he's dead, so she wants revenge. Although in season 2, she's mostly either Brainwashed and Crazy or half-mad with grief.
    • Zagato himself sent out several people to murder the Magic Knights, in a couple of cases taking advantage of said people's emotional vulnerability to manipulate them into evil acts and outright brainwashing one. He did this because he was in love with Emeraude and desperate to save her from her fate, which leads us to the third...
    • Emeraude's love for Zagato made her unable to support the land as Pillar, which is the real reason it's in such a bad state. When the Magic Knights kill Zagato, she completely loses it and tries to get revenge. Her fear of just such an event is why she summoned the Magic Knights in the first place: to kill her before she could destroy Cephiro with her power.
  • One of Patrick Zala's main motivations in Mobile Suit Gundam SEED was to avenge the death of his wife Lenore, killed by Naturals during the Bloody Valentine Incident.
  • Subverted(ish?) in Ask Dr. Rin!. Tokiwa appears to be obsessed with becoming Meirin's boyfriend, but he's possessed, and the demon has more sinister motives. However, he seems to have feelings for her even afterward, and the series never made clear exactly how he got possessed in the first place, so it's at least possible, if not likely, that the two are connected.
  • The Yandere Yuno from Future Diary tries to justify her evil deeds and homicidal tendencies by saying it's all for Yukiteru's sake and it also corrupts Yukiteru.
  • In the GSC Arc of Pokémon Special, the Mask of Ice, later revealed to be Pryce, the Ice-type Gym Leader of Mahogany Town. His motivation behind resurrecting Team Rocket was out of love for his Lapras. He wanted to capture Celebi for turning back time so his Lapras could return to its parents. Even at the cost of the world freezing over from turning back time.
  • This is Ren Sohma's Freudian Excuse in Fruits Basket. She was the maid who took care of the former leader of the Sohmas, Ill Boy Akira, and the only one able to reach for him. But when Ren married him, got pregnant and started fearing that he'd love her less once their child was born... Ooooh, boy.
  • Misa Amane from Death Note. She loves Light Yagami because he is Kira, and then she loves Kira because she feels she's in debt to him for killing the burglar who murdered her parents when Misa was young. And because she loves Light... Misa becomes the Second Kira.
  • Stefan Levin from Captain Tsubasa was a normal and talented Swedish soccer player until his beloved fiancée, Karen, died in a car accident. Before she perished in his arms, Karen begged him to do his best and become the top player in the world... Little did Karen know that the emotionally devastated Levin would become an emotionless boy in pursuit of technical perfection, injuring his rivals if it was needed to fulfill his vow. Poor Müller and Akai, indeed.
  • Fei Wong Reed from Tsubasa -RESERVoir CHRoNiCLE- is all but outright stated to be this. He claims the purpose of his plans is to prove he's the most powerful magician of all time, but some of his words later seem to suggest otherwise. He enacts a centuries long unimaginably complex Gambit Roulette that involves the death of millions (if not billions- at least one UNIVERSE has ended by Ass-chin's deeds), all for the sake of bringing someone ( Yuuko) back to life. Or keeping her from dying. Un-dying? Un-unkilling her? Terminology gets really confused at this point, as does the reader. She died years ago, but a certain Reality Warper with Power Incontinence accidentally caused the universe to not notice it; Fei Wong wants to either keep this state of affairs or make her 100% alive rather than zombie-ish. Eventually, it's revealed that Fei Wang Reed was likely to be the "afterimage of a wish made by someone with strong magic", meaning that he were probably created out of the said Reality Warper's deep subconscious desire for Yuuko to stay alive, ie he was the physical manifestation of "Love Makes You Evil"
    • Naturally, she makes reality retroactively notice her death as payment to help to stop him.
  • Wendy from the Read or Die the TV, who sheds her clumsy demeanor to becomes a cold advisor all out of admiration for Joker.
  • A recurring theme in the current arc of Naruto, is that love (not exclusively romantic love) can lead to hatred and war. This is seen in Sasuke wanting to destroy Konoha in order to avenge Itachi and Pain's Start of Darkness.
    • Gaara's abusive father the Kazekage is revealed to have been this in the Shinobi War. He loved the village of Sunagakure and wanted to protect it. He pulled ''horrible'' shit on everyone to do so.
    • As quoted by Tobi or Uchiha Madara or someone else:
      "When a man learns to love, he must bear the risk of hatred."
      • This becomes more meaningful during the chapter that revealed that Tobi was Obito. The chapter is basically a long flashback that shows Obito's childhood, focusing on, rather than his relationship with Kakashi, his relationship with Rin, the girl who he was in love with. It has now been confirmed that Rin is dead (at the apparent hands of Kakashi, none the less) and that her death is what caused Obito to become Tobi. Essentially the entire basis of his plan is to create a world where Rin is alive.
      • It is ultimately revealed that this is the nature of the Uchiha clan's curse. Their love is stronger than that of any other clan. Whenever an Uchiha loses someone they loved (almost always due to war due to the setting) that love turns to hatred and revenge that much easier. Their brains are able to turn grief into special chakra that creates the Sharingan which is why they tend to get more eye powers under extreme emotional duress.
  • In Bannertail: The Adventures of Gray Squirrel, most of the villainous, bowtie-wearing Akācho's dirty doings revolve around attempting to steal away Sue, whom he loves. (This includes getting the hero doped out of his mind on shrooms in one episode.)
  • In Spiral, Kanone wants to kill all of the Blade Children... because they're basically cursed abominations not meant to exist blablabla, yes, but also because "all of the Blade Children" includes his best friends (and himself) and he really thinks it's for their own good, just so they don't suffer more than necessary, don't fall into despair like he has, don't lose their selves (a very real Threat), etc. This leads to many breakdowns of the "Why don't you understand me ?!" kind.
  • In Prétear, a Magical Girl named Takako falls in love with Hayate, but he rejects her. In her despair, she calls the forces of darkness to her and becomes the Princess of Disaster. And in the anime, when the Knight Sasame realizes that nothing he can say or do will convince Takako to become good again, he reveals that he's always loved her, and betrays the Knights so he can stay by her side (even though he's fully aware she doesn't love him).
  • Many of the clients' stories in Nightmare Inspector involve love in some way. Said stories almost always involve murder, or occasionally suicide. Although sometimes things are a bit cheerier, and love just causes much emotional suffering.
  • From Bleach, we have Tousen, whose close friend was killed by her shinigami husband, after she had scolded him for killing his comrade in battle. So what he does is join up with Aizen, pretty much wants all the shinigami dead and is willing to destroy a town full of people, all to get revenge on every single shinigami. Talk about Disproportionate Retribution.
    • Jesus, Gin. In chapter 415 we finally learn that he allied himself with Aizen, thus taking part in many murders and betraying Soul Society, only to find the right moment to kill Aizen for attacking and stealing a part of his childhood friend Rangiku's soul when she and Gin were still living in Rukongai. Talk about going to great lengths.
  • Vincent from Pandora Hearts will do anything, anything for his brother Gilbert, whether Gilbert likes it or not (almost always "not"). Gilbert himself is at least sometimes in the Love Makes You Crazy category for Oz. It hasn't been revealed how far he'll actually go for Oz.
    • Glen is shown in flashbacks to have these tendencies. At least until it's revealed that Jack, not Glen, was driven insane by his love for Lacie and by her inevitable death. Oswald-Glen actually handled Lacie's (who is actually his younger sister) death fairly well for someone forced to kill his only family.
  • Rozen Maiden has both Suigintou and Kirakishou subject to this, although Suigintou's case is not as severe as Kirakishou's. Still, Suigintou loves her father so much that she is willing to discard almost all signs of friendship just to meet father and become Alice, partially due to a sense of incompleteness and personal betrayal at the hands of Shinku. Kirakishou, however, takes it a few steps further and imprisons past and present mediums of the other dolls in crystal, having some kind of love-crazy obsession over both the mediums and the dolls. So much she wants to eat her sisters, to make them part of her. Interestingly enough, Suiseiseki, who is also motivated by love, manages to avoid this trope completely, and can arguably be classified as the most caring doll in the series, despite her habits.
  • With its various murders and other crimes over the year, it's only natural that Detective Conan should visit this trope from time to time. This includes cases where the victim's obsessions with the person they loved led to blackmail, and eventually their murder. And in one case a man became so obsessed with getting one woman to love him that he drugged her and set her in a burning building planning to 'rescue' her and become her Knight in Shining Armor. It's not only related to romance, either. There's also:
    • Sibling love (a Buddhist novice kills his master after learning he murdered his older brother, an average guy becomes a thief to force the police investigate his younger sister's presumed murder, a ghost writer brutally kills his boss after he causes the death of his Ill Girl sister when he was supposed to pay for her treatment, an Innocent Flower Girl brews a Thanatos Gambit to punish her older sister's rival who stole her tricks and drove her to kill herself; an uni student enters a local Tokusatsu fan club and kills the biggest Otaku in the group for stealing his little brother's memorabilia out in the open and cauing the kid to get hit by a truck;
    • Parental love (a widow keeps her son locked up for years because she doesn't want him to turn himself over after accidentally killing his dad during a fight, a businessman stages a Batman Gambit to catch and kill the hitman who caused his little daughter's death by proxy during one of his "missions"; a security guard beats up ganguro girls after one of them accidentally runs over his son);
    • A son/daughter's love for their families (the anti villainous Crossdresser who kills almost everyone related to his parents and siblings's deaths when he was a little Ill Boy, the Sexy Secretary who makes a Corrupt Corporate Executive believe that she kidnapped and killed his daughter as revenge for him causing the ruin and death of her family, the Osakan cop who becomes a Serial Killer to punish the people who caused his father's death in a prank Gone Horribly Wrong);
    • Friendship (a computer expert disguised as a Corrupt Corporate Executive's butler kills his boss to avenge his best friend, driven to bankruptcy and suicide by him; a teen detective kills another fellow sleuth after he wrongfully accuses her best friend of killing her boss and causes her to kill herself too);
    • A mentor/teacher's love for their pupils (a school teacher kills two of her co-workers after they murder one of their students when she finds out they're involved in money frauds; an uni professor kidnaps Takagi and puts him in a cruel Death Trap while forcing half the Beika police force to watch because he mistakenly believes that Takagi is the man who dumped his favorite pupil and caused her to go the Spurned into Suicide way.)
  • The yaoi manga Under Grand Hotel has a few examples. In the first few scenes we see Lain Brody in he gives Sen a blowjob, strips him, drugs him and outright molests him as he's drugged (including telling him "No way in hell am I letting Sword Fish kill you. Because he doesn't love you. I'm the only one that can kill you."), rapes him with a mop handle, ties him up and hides him in a dryer. And when Swordfish finds Sen he gives him CPR. Lain responds to this by stabbing Fish in the arm with a fork and screams at him, "Get off of Sen! He belongs to me!" Immediately after that Lain is shot and killed by security guards.
    • Also, Swordfish acts in such a manner whenever Sen is involved. He threatens anyone who expresses an interest in Sen with death, kills the guys who raped Sen saying that he did it for Sen's sake even after Sen told him not to kill them, moves out of Sen's room and lets a rapist move in when angry with Sen, and slices the throat of another one of Sen's rapists right in front of him while saying "I love you, Sen." This being after he tried to get Sen to kill the guy himself but Sen refused. He also nearly raped Sen to almost death in one scene.
    • And Norman's in love with Swordfish but pretended to be in love with Sen so he could get closer to Swordfish. He tried to persuade Swordfish to kill Sen but that didn't work. So, on one occasion when there was a scuffle going on he tried to get Sen out of the way by stabbing him with a pencil but accidentally ends up stabbing his inmate Walter instead.
  • In Trigun, Hoppered the Gauntlet joins the Gung-Ho Guns so that he may get revenge on Vash, whom he believes destroyed July City and the blind girl Hoppered looked after who lived there. Also, Leonof the Puppet Master may have run away from home to become a Gun after being rejected by a woman he loved.
  • Near the end of Mirumo De Pon, it's revealed this is the Big Bad 's Freudian Excuse for turning to The Dark Side and wanting to destroy Mirumo and the Fairies' royal line: in his younger days, he got cruelly rejected by the girl he loved. Mirumo is not pleased when hearing this and chews Dark out a new one, calling him an idiot and a pain for such a ridiculous motive.
  • Alois of Black Butler II once stabbed out Hannah's right eye apparently to get Claude's attention.
  • Cardcaptor Sakura: The villain of the first movie is an ancient sorceress who fell in love with Clow Reed...and after a battle with him, he sealed her away in another dimension inside a book. As she captures Sakura's friends and family, and nearly drowns Sakura in the climax, most of her dialogue is simply "Where is Clow Reed?!" After a distraught Sakura whispers to her that her love is dead, the sorceress dissolves away in her own tears, whispering "But...I waited..."
  • Marco, Manipulative Bastard par excellence and quarterback/quarterback spy for the Hakushuu Dinosaurs in Eyeshield 21 is motivated entirely by his desire to impress his crush — and upperclasswoman — Maria, manager of the team. To do so, he institutes a regime of brutal plays, using Gaou and Kisiragi to cripple the quarterbacks and recievers of other teams. In the process, of course, he only drives Maria further away. Interestingly, she may have confessed her feelings to him after his final defeat.
  • Shinra of Durarara!!, despite being an otherwise Nice Guy, has explicitly identified himself as stated in the quote at the top of this page.
  • This is the case for Lord Gilles de Rais in Tetragrammaton Labyrinth whose love for Joan of Arc leads him to try and destroy all humans.
  • Quite a few cases in Muhyo and Roji.
    • Enchu worked hard to become an executor so that he could support his sick mother. His Start of Darkness was his mother dying of illness around the same time that he lost the position to Muhyo. Several characters notice that he's a potential victim for this trope, as Page tells him that one of the reasons he was passed over was his preoccupation, and Teeki caused his mother's death so that he could eventually take his body.
    • Rio joined Enchu after her mother's death, especially after two Executors refused to help her.
    • The Cortlaw siblings- Kid, Ivy and Mick- want to bring their parents back from the dead.
    • Panza became attracted to Roji after he showed her kindness by giving her a spare application form, and was thus desperate to be noticed by him, enabling Teeki to manipulate her into joining Ark.
    • The haunt that Muhyo and Goryo are competing to exorcise is that of a single mother who went insane after her daughter was killed in a traffic accident, obsessively creating the dolls that her daughter wanted as a gift (which her haunt form uses against the heroes). Eventually, the spirit of the daughter intercedes, and while the daughter would have gone to Heaven while the mother went to Hell, both end up in the Styx (essentially Purgatory) by way of a compromise
  • SD Gundam Force has this trope by way of Deathscythe's Start of Darkness. His obsessive love for Lacroa's Princess Rele is what led him to join the Dark Axis, hoping to hijack the kingdom's magic and use it to become human like her.
  • An oddly literal example from Princess Tutu: the fragment of Mytho's heart that contains Love gets soaked in Raven's blood, so that it turns him evil when it's returned to him. Also, in a more traditional example, Kraehe's motivation turns out to be her desperate desire for his love.
  • Rune of Karakuridouji Ultimo nearly rapes Yamato when his feelings for him go unreturned. As well as the other evil things he does out of love for Yamato.
  • This is the reason for everything that goes wrong in Wolf's Rain.
  • Attack on Titan takes place in a Crapsack World full of grey morality, so it's hard to say it's a negative thing, but Mikasa loves Eren, and there is no one and nothing she wouldn't kill to protect him, and the same goes for Armin (though he's not the type to fling himself facefirst into trouble like Eren is). Getting on Mikasa's bad side is about as good an idea as jumping off a cliff. Annie finds that out the hard way.
    • In chapter 47, Ymir admits that her love for Christa is wholly selfish. Ymir is willing to endanger Christa just for the chance to see her again and outright kidnaps her because she's "a shitty human being".
  • Puella Magi Madoka Magica the Movie: Rebellion takes this trope to it's Logical Extreme. Homura's Soul Gem is corrupted by her love for Madoka, and she steals Madoka's powers. This turns Homura into the devil.
    • Just to be clear Homura doesn't want Madoka all to herself; in fact she doesn't even care if Madoka loves her back. Rather, Homura just wants to see Madoka happy...and because she loves Madoka so much, she's willing to go to any lengths to do so. In fact, it's the strange interaction of BOTH character's selfless attitudes that cause this to happen. The catalyst is Homura meeting a Madoka with amnesia (effectively a Madoka in the past) who expressed desire to be normal and live her own happy life, which directly contrasts the current Madoka's extremely selfless "protect the happiness of everyone at the cost of myself" attitude. This means that in order to protect and satisfy THAT Madoka, she has to directly betray the current, selfless Madoka. So she's acting in the selfish interests of a person who's become deeply selfless, the evil part comes in the ambiguity of just how much damage she chose to cause in the process.
  • Fairy Tail: "The Black Wizard" Zeref had this twofold: he became cursed by Ankhseram for studying taboo magic in order to bring his dead brother back to life. This led to centuries of being ostracized by the world at large and considered the most evil mage of all time. However, he didn't really break until he fell in love with Mavis Vermillion after finding out that they shared the same curse. They kiss...and she dies, because his happiness contradicts the purpose of the curse, which is to ensure that the recipient can never be happy. That's when his true Start of Darkness began.
  • High School DXD:
    • Played with in Irina's case. She's a genuinely good person through and through, but as a Brave Saint, she can't even think too hard about how much she loves Issei or she's in danger of joining the Fallen Angels. This has nothing to do with her feelings themselves, which are entirely sincere, but because the modern idea of love is so intertwined with sex that it counts as being a sinfully lustful thought. Even Archangel Michael admits the system is horribly out of date, but for spoileriffic plot reasons it can't simply be changed. instead, he has Heaven develop a way around it.
    • Also examined with Issei. He's normally running on the power of lust and Crazy Awesome, but threaten anyone he loves and the staunch Technical Pacifist is liable to end up with a body count. Issei on The Power of Love is a horrific, bloody, no-holds-barred affair where he'll stop at nothing until the threat to his loved one ceases to exist.
  • In Dangan Ronpa 3, Kyosuke's love for Chisa causes him to snap and become a Knight Templar after her death. He becomes increasingly paranoid and extremist, to the point of attempting to murder his best friend because he suspects him of working for the enemy.
  • In Bungou Stray Dogs, the reason Fitzgerald wants to get his hands on the reality-altering book is to bring his dead daughter back to life for the sake of his beloved wife, who's deluded herself into thinking their child is studying abroad.
  • In The Seven Deadly Sins, the immortal Meliodas was cursed by the Demon King to watch his soulmate die, be reborn into a different body, and die again, forever. And if she realizes the nature of the curse (or why it was cast), her next death is invariably swift and painful. The cycle has repeated 106 times before the series starts, and even the mere thought that he might fail again to save her sends Meliodas into a despairing rampage like the one that annihilated Danafor.

    Comic Books 
  • Happens to both Aquaman and Martha Wayne in Flashpoint. Aquaman does this out of vengeance for his wife's murder at the hands of Wonder Woman, after his wife caught them in an affair. In Martha's especially tragic case, she bears witness to her son dying in her arms at the hand of the mugger who originally killed her and her husband. Unable to bear it, she quickly goes from crying over their loss to manically laughing with her son's blood staining her face in a look reminiscent of the Joker. Which she just so happens to become.
  • In Supergirl (Rebirth) Cyborg Superman does horrible, horrible things like turning corpses into reanimated, soulless zombie cyborgs and making human sacrifices. And everything — everything — he does is because he loves his daughter — Supergirl — and wants her to be happy. He says "I'm doing this for you!" over and again, and he means it.
  • Inverted with Thanos of the Marvel Universe, who was evil from the very beginning (or best case, a Noble Demon), but through it found love in (the Lady Death) itself. However, their tumultuous relationship has been known to drive him crazy at times.
  • Black Adam in The DCU first turned to totalitarianism when his wife was killed while he was away. Eventually (as in thousands of years later) he started to reform, especially when he fell in love again with Isis as seen during 52. When Isis was murdered, he leveled an entire nation and took on every active superhero on Earth at once. Later he combined this trope and With Great Power Comes Great Insanity. When he resurrected Isis with a fraction of his power she turned evil, ripped Captain Marvel from his powers and wrought chaos in the world seeking revenge. Later in that same story Mary Marvel, corrupted with powers Black Adam gave her, threatens Billy's ex-girlfriend, forcing him to take a part of her powers, which turned him evil.
  • Batman:
    • Harley Quinn in the DCU. She was a psychiatrist at Arkham Asylum until she was assigned to The Joker. Falling in love with him, she broke him out and joined him as his girl sidekick. To what degree the Joker returns her feelings is questionable, ranging from 1% to zero. However, almost all her evil acts are an attempt to secure his affection.
    • Also, in some versions, this is why Mr Freeze is a villain, for the love of his Ill Girl wife Nora.
    • And according to The Killing Joke, The Joker himself would not be who he is if he did not (once upon a time) have good intentions to give his late, pregnant wife a better life.note 
  • Ramona Flowers of Scott Pilgrim has seven evil exes that the titular character must defeat, and in a few cases the ex-boyfriends have been hinted at as being not exactly evil to begin with, but turning evil after the inevitable breakup. The same fate may befall Scott, as well.
  • Depending on the writer, Marvel Comics villain Whirlwind is this. At one point, he accuses The Wasp of "owing" him, because his attacks on The Avengers were attempts to get her attention.
  • The Jackal's Start of Darkness began with the death of Gwen Stacy. As Professor Miles Warren, he was secretly in love with his student, and could never get it out of his head that Spider-Man (who he later discovered was another of his students and her boyfriend) was more to blame than the Green Goblin was. (Why he would actually work for Norman Osborn, the true mastermind behind The Clone Saga, is anyone's guess.) Indeed, he tried to recreate her with a clone of Gwen (dozens, actually, but only one shared Ben Reilly's apparent immunity to the degeneration factor). When the second Carrion (Malcolm McBride) appeared (with Warren still believed dead) Spidey called Warren "A sick man obsessed with a dead woman" in disgust. But even when revealed to be alive, he would never let Spidey forget it. In fact, in one of the last fights between them (when his consciousness was inside the body of a coroner who had turned himself into the third Carrion, in Spider-Man: Dead Man's Hand), Spidey told him, "Still hung up on Gwen, huh? Some things never change."
  • The Mighty Thor:
    • Skurge the Executioner fought on the side of evil because he was in love with Amora the Enchantress. At first it seemed like she only strung him along, using him as valuable muscle, since he was strong enough to fight Thor. But she actually did miss him and even tried to bring him back from the dead several times.
    • A juvenile, nicer incarnation of Loki gleefully explains to his current love interest that he was willing to postpone whatever plan he had to help Asgardia, thus risking it failing, just to increase the odds of saving her too. Loki, when he has people he cares for, which is admittedly not often, has a general tendency to do terrible things for their benefit. Putting them before the fate of the world or making deals with literal devils several times over.
  • In the Squadron Supreme limited series, Golden Archer brainwashes his girlfriend after she rejects his marriage proposal. Hyperion's extradimensional duplicate murdered Zarda's husband after falling for her. Admittedly, this is more accurately an example of "Love Makes You More Evil Than You Were Already".
  • At some point in time during The Ballad of Halo Jones, Toby the robot guard dog brutally murders his owners in secret. When Halo listens to his old memory tapes and hears her friends dying, she asks herself why he did it. Whereupon he promptly appears in the room and says "Love, Halo. I did it all for love." Toby's owners had left him to Halo in her will and apparently the robot dog's love for Halo was powerful enough to override any programming he might have along the lines of "Hey, robot dog, don't kill your owners." Cos Halo is just that sexy, obviously. Anyway, Halo pretends to be pleased that he loves her that much, but Toby can tell from her heartbeat that she's hell terrified, so he attempts to kill her. And fails, of course.
  • Jean Loring's ultimate motivation in Identity Crisis. The "so we can be together" quote in the trope description is even repeated, almost verbatim, at The Reveal.
  • In Archie Comics' Sonic the Hedgehog, Fiona Fox pulled a Face–Heel Turn because she fell in love with Sonic's Evil Twin Scourge. At least, that's her story; considering who we're talking about...
  • Becomes a Discussed Trope in Archie Comics' Mega Man. Agent Stern warns Dr. Light that giving his robots emotions is a really dumb idea because of this trope and gives some nice Foreshadowing of the Mega Man X series in the process.

    Fan Works 
  • A Crown of Stars: Shinji loves Asuka so much he — someone who hates killing even in self defense — would kill with his bare hands, crush or burn alive whoever hurt her, and he would "burn Heaven down for her". It disturbs him severely when he realizes that he would become a monster if something happened to Asuka. So that he tells her he would do anything for her, even becoming a monster, and he trusts her to hold him back.
  • Advice and Trust: It's pointed out several times in-story and out-of-story by the author that Gendo does that he does (which includes treating his children and subordinates like crap, using child soldiers and treating them like replaceable and expendable troops, using suppressant drugs to turn Rei into an obedient, mindless puppet, firing Shinji and Asuka — his best pilots — for a so-called insubordination and plotting the end of the world) because in his mind nothing — NOTHING! — is so important like his wife and he will do everything and anything to save her.
  • HERZ: Misato feels she has much blood on her hands because she has done many questionable, shady things. And she did everything because she loved Shinji and needed to see him happy.
    "Everything I did, I did it for Shinji. I wanted to... I needed to see him grow up. To have a family. A chance to be happy. I needed that..."
  • The Bleach fanfic series Heirverse, Jac's backstory and Freudian Excuse it doesn't make him less of a Complete Monster though.Well maybe a little
  • The One I Love Is:
    • Gendo tells that his hands are blood-stained because he thought it would be the only way to reunite with his wife.
    • In an alternate ending Shinji is so determined to get Asuka back that he is following on his father's steps.
  • Koga from The Sun Soul qualifies for this trope. He might have betrayed his clan, city, and code to Team Rocket, but only because he wanted to take care of his daughter.
  • MALIK from the Buzz Lightyear of Star Command / Lilo & Stitch / Invader Zim crossover series Both Syllables is a dedicated, if misguided and aggressive, space ranger... until she meets Zim, and goes over to the side of the planet-conquering Irken Empire.
  • My Immortal: "When Voldemint was in Hogwarts before he became powerful he gut his hearth borken. Now do you fink he would still become Volxemort if he was in love?"
  • The Second Try: Shinji caused Third Impact because Asuka rejected him ("No one loves me, so everyone must die"). In the altered timeline, he almost caused the Third Impact again because he believed Asuka was dead.
    Yui: Is it okay now?
    Shinji: Yeah. She's fine. That's all that matters to me.
  • RE-TAKE: Shinji, very nearly — "I will throw the world into the pits of hell to find Asuka again!"
  • In Til the Sun Grows Cold and the Stars Grow Old, a fanfic of The Legend of Zelda: Twilight Princess, this is the reason behind Zant's conquest of both the Light and Twilight realms — he proposed marriage to Midna and was rejected.
  • In The Official Fanfiction University of Middle-earth, all of the Legolas fangirls are willing to stab each other.
  • Inner Demons: It's implied throughout the story (and eventually confirmed posthumously at the end) that Trixie is in love with Twilight Sparkle. That's why she ignores her moral compass and becomes The Dragon when Twilight is consumed by the Darkness and becomes the Big Bad.
  • The first finale of Children of Time has two examples, the latter an Ironic Echo of the former. Sherlock Holmes submits to Professor Moriarty's Sadistic Choice — Moriarty is playing with a full deck and uses the Watson card. On the other hand, Holmes later explains that he jumped off the slippery slope willingly because he was tired of hurting.
    • The Ironic Echo is Beth, who, having previously dressed Holmes down for willingly surrendering, does so herself, trading her life for his, Watson's, and the Doctor's. Also, like Holmes, her motivations are not entirely pure: part of her bargain is that she be kept in Victorian London and not have to leave that era (and, by extension, Holmes).
  • While Vanitas from The Shrouded Path certainly isn't a good guy, he does seem to have some morals. Then he gets a chance to finally be with Aqua and Terra and all those go out the window.
    • Likewise, many of Ven and Terra's morally ambiguous actions, especially in the sequel, are motivated by their need to protect each other and Aqua.
  • Phaedra from My Brave Pony: Star Fleet Magic III, turned to evil because her boyfriend Royce left her.
  • In Thousand Shinji:
    • Played straight with Gendo, who would do anything to get his wife back.
    • Zigzagged with Shinji. On one hand, he became slightly tolerable when he got a girlfriend, family and friends. On the other hand, he'll kill ruthlessly and bloodily whoever threatens them, and started an Impact event to bring Asuka and Misato back from the dead.

    Films — Animated 
  • Lots-O'-Huggin' Bear from Toy Story 3. After believing he was spurned by his owner (who loved him more than anything in the world), he becomes a twisted tyrant of the daycare center and a G-rated nihilist.

    Films — Live-Action 
  • Star Wars
    • Once-noble Jedi Anakin Skywalker became the Sith Lord Darth Vader because he hoped the Dark Side of the Force would grant him the power to save his pregnant wife from the death by childbirth he foresaw. She ended up dying anyway, partly because of his turn to the Dark Side. What's interesting is that, three films later, his son's love for him made Anakin good again.
    • In fact, an ironic commonality in Star Wars is that both the Jedi and the Sith believe this. The Old Jedi Order believe love is an inherently corruptive emotion that at best draws a person's attention away from the Force towards the physical world and at worst makes them vulnerable to the lure of the Dark Side. The Sith, meanwhile, believe something closer to Love Is a Weakness, with a philosophy that love should be shunned because it can quench hatred and rage, weakening the power of the Dark Side.
  • When Sarah finally confronts Jareth at the end of Labyrinth, he claims that he's put her through all this because he loves her. Whether he is sincere, taking a desperate gambit to delay her until time runs out, or trying to tempt her to The Dark Side is an open debate. Most of the Fanfic community (naturally) falls into the first camp or a combination of the three.
  • In Ghostbusters II, Jaonsz falls into this. He's initially a Dogged Nice Guy, but then undergoes Demonic Possession for most of the film. In the third act, he rejoices at the prospect of Dana becoming his wife if he helps Vigo abduct Oscar. He gets better later in the end.
  • The hidden setup of So I Married an Axe Murderer as we find out in The Reveal. It is questionable, however, on whether the culprit, Rose Michaels, is actually insane the whole time.
  • The version of Dracula in Bram Stoker's Dracula declares war on God because of love (specifically, because his fiancee killed herself upon hearing lying reports of his death, and the church taught that her act irredeemably damned her soul to Hell).
  • The 1956 horror film The Black Sleep stars Basil Rathbone as a 19th century neurosurgeon named Cadman who uses experimental brain operations to turn his colleague into a mindless brute with an incestuous longing for his daughter and keeps him around to force his daughter to work for him, has his assistant abduct homeless people with promises of shelter and pay, destroys a test subject's ocular faculties so he cannot see and escape, frames his star pupil for murder, fakes his pupil's death, and then blackmails him into helping him or risk exposure. Why is Cadman doing this? So he can learn enough about how the brain functions to save his wife from a paralyzing brain tumor.
  • Imhotep in The Mummy Trilogy. He spends most of the two movies he's in trying to bring Anck-Su-Namun back. And, you know, raining down the ten plagues of Egypt and sucking the life out of anyone who stands in his way. He's a combination of this trope and Cursed with Awesome, with some Bad Powers, Bad People thrown in for good measure (that is, even if you weren't so evil to begin with, becoming able to rain down the ten plagues of Egypt is a sure sign of villainy). In a rather brutal twist, it turns out that all of Imhotep's actions were in vain. He finds out in the last moments of his life that Anck-Su-Namun doesn't love him as much as she loves her own life, and she certainly doesn't love him as much as Eve loves Rick.
  • Davy Jones in the Pirates of the Caribbean sequels. He fell in love with Calypso, goddess of the Sea, and became Captain of the Flying Dutchman so they could be together in ten years. When she failed to show up, Jones carved out his own heart, helped the Pirate Court trap Calypso in a mortal body, and made the Dutchman his personal torture chamber, (turning himself and its crew into Fish People as a side-effect).
  • Auntie in the Japanese campy slapstick horror-comedy movie House (Hausu) kills and eats young, unmarried girls and possesses the body of her niece just so she can remain immortal and marry her long dead fiancee, who she believes will return to her.
  • Lifetime movie Stalked At 17 flirts between this and Love Makes You Crazy. Chad, a twenty-two-year-old college student, becomes obsessed with his sixteen/seventeen-year-old girlfriend, Angela, when she reveals that she's pregnant. When Angela's parents find out about her pregnancy and the father of their grandchild, they try to create some distance. This doesn't set well for Chad as he starts to stalk them and tries getting in contact with them. His Yandere levels go through the roof when he tries attacking Angela's father for getting a restraining order against him. He even turns to his mother, who was recently released from prison, for help on kidnapping Angela and their newborn son so that they can be a family together.
  • The Three Musketeers (1993). Arthos has a bit of a story about love. It doesn't end well.
  • In The Brain That Wouldn't Die (seen on MST3K), Mad Doctor Bill Cortner only went Jumping Off the Slippery Slope when his fiancee Jan was decapitated in a car crash and he had to use Mad Science to turn her into a Head In A Pan; going from just "borrowing" spare limbs for medical research to cruising strip clubs and seducing Broken Birds to get a replacement body for his loved one, even as she only asks "Let me die".
  • The Hole combines this with Love Makes You Crazy in not just one, but two examples, owing to its use of "Rashomon"-Style. In the first version of the story, Liz explains that Martin's love of Liz and jealousy of her liking Mike led him to lock Liz, Mike, Frankie and Geoff in the titular bomb shelter (in which they had been hiding to avoid going on a school trip) until she realized she didn't really like him very much. In the second, true version, it is revealed that Mike wanted to leave the bomb shelter early to go patch things up with his ex, but Liz had become so obsessed with him that she decided to lock herself and the others inside the bomb shelter to prevent him from leaving, ultimately leading to Frankie, Geoff and Mike dying. She then kills Martin too to cover her tracks.
  • The loss of his wife is what primarily pushes Khan over the edge in Star Trek II. Not that Khan was ever a nice guy, of course, but beforehand he was an apparently sane Social Darwinist, as seen in "Space Seed". Nero has similar issues in the new film due to his own dead wife.
  • This can be said of Two-Face in The Dark Knight after Rachel Dawes dies.
  • In every incarnation of Little Shop of Horrors, Seymour slowly becomes a murderer because he believes success is the only way to win Audrey's heart.
  • Doctor fuckin' Phibes! He slowly kills the doctors he believes responsible for his wife's death.
  • In Hot Fuzz Frank Butterman forms a deadly city council to eliminate all flaws to the community after his wife commits suicide after Travelers ruin the town, causing them to lose the Village Of The Year award. Lampshaded by his son: "If Mum knew what you were doing she'd kill herself again!"
  • If you assume that this trope could come up in a film called Love Is The Devil, you are most certainly right in doing so.
  • It appears that this is Horvath's true reason for betraying Merlin and siding with Morgana in her quest to destroy the world in The Sorcerer's Apprentice. He just couldn't handle Veronica choosing his best friend Balthazar over him.
  • In The Last Circus it is Javier's love for Natalia that leads into his downfall and eventual descent into insanity.
  • Non-romantic love, but Loki in Thor loves his father and his Asgard home very, very much. His desire to be acknowledged and loved on par to his brother Thor leads him to attempt genocide.
  • In The Other Boleyn Girl Henry tells Anne how he broke off from the Catholic church for her. "I have torn apart this country for you, gone against every principle in my heart, I've endured the doubts and counsel of good men and silenced them with the axe...just to be with you."
  • In the 1960 French horror film Eyes Without a Face, Dr. Génessier's beloved daughter Christiane is in a car accident that leaves her with a horribly disfigured face. Obsessed with making her beautiful again, the doting father starts kidnapping other young women and transplanting their faces onto his daughter's.
  • Subverted with Professor Fassbender in The Pink Panther Strikes Again, who would rather die than help Dreyfus destroy the world and succumb to Stockholm Syndrome, but he can't bring himself to let his daughter suffer either.
  • In X-Men Origins: Wolverine, Victor did not take his brother James leaving him for a life of peace well... not in the least.
  • In I Shot Jesse James, Robert Ford kills Jesse James, attacks John Kelley, and gets into a final duel to win Cynthy's hand. However, not only does this drive Cynthy away from him, it also leads to his eventual downfall.

  • Agatha Christie loved this trope. Many of her characters' motivations for murder came out of love for their significant other. Notable examples include:
    • Vera Claythorne from And Then There Were None (although she wasn't the murderer, her motivation for her crime, allowing a child in her care to swim out to sea and drown, was for her lover, who also happened to be the child's uncle, to inherit his estate),
    • In Nemesis, the girl whose murder instigates the plot is said to have died because of "love, [...] one of the most frightening words there is in the world." Her adoptive mother, rather than give her up so she could marry a delinquent, gave her an overdose of sleeping medicine, secretly buried her in the garden, then strangled and bashed another girl's face in so everyone would think the delinquent had killed her.
    • Also the killer's motive in the Hercule Poirot novel Three Act Tragedy. The murderer wants to marry their crush, but is unable to do so without committing bigamy, as he's already married and is unable to divorce his wife due to her being in an insane asylum. Not many people are aware of this fact, but to prevent the possibility of a scandal arising, he murders the only person who knows about his first marriage — his childhood friend.
  • Scrooge's greed in A Christmas Carol ultimately stems from his desire to marry and provide for his impoverished childhood sweetheart, who has no dowry. Unfortunately, the turn his personality takes in scrabbling to be wealthy kills Belle's love for him.
  • Definitely the case for Vlad Dracula and Elizabeth Bathory in Count and Countess. To get to Elizabeth's time period, Vlad has to find a way to outlive his natural lifespan. For that cause, he will do anything. Even if it turns his entire nation against him.
  • Philip Cutler from the Cutler Series by V. C. Andrews originally dated the heroine Dawn in the first book. But even when it's revealed that Dawn is in fact Philip's sister/half-sister/aunt and she loses all romantic interest in him, Philip's original interest becomes exceedingly twisted and he still lusts after her regardless of their blood relation and eventually rapes her. He holds onto his obsession well into adulthood and eventually marries a woman he attempts to mold into Dawn's image. When Dawn dies in Midnight Whispers Philip transfers his obsession to her daughter Christie.
  • Kirsten in Deltora Quest 3: Shadowgate. She fell in love with Bede, a Masked One, who seems to reciprocate.. .but he fell for her sister instead. Her response involved yandere-like jealousy, using dark magic to enslave Bede to her, transforming her sister into a pendant to control him and turning him into a decoy guardian to confuse anyone seeking to destroy the Sister of the North.
  • The Divine Comedy:
    • Francesca of the Circle of Lust blames her adultery on love, a force so strong that it left her and her brother-in-law with no agency in their sin. Her romantic language is so beautiful that Dante faints from distress, but every discussion of love outside of this sinner's excuses makes it clear that love is an intelligent will to do good for others, as opposed Francesca's view that love is really wanting to have sex.
    • Virgil explains in Purgatory that love can lead to evil only because love is the cause of every single human behavior. Lust, gluttony, and greed are caused by excessive love for physical pleasures, sloth is caused by love that is not acted upon, while wrath, envy, and pride are love for the suffering of others.
  • One of the major themes in KJ Parker's Engineer Trilogy. After being condemned to death by the Mezentine Empire, Ziani Vaatzes kills three people with his own hands, escapes to a technologically backward country and directly causes the deaths of over seventeen thousand Mezentine soldiers by overseeing an advanced weaponry program, all the while intending to betray the people he's selling the weapons to, because, in his own words, "I'm in love with my wife, you see. If I die, I'll never see her again. So I had to live. It's that simple." It's made all the worse by the fact that Vaatzes knows exactly what the consequences of his actions are going to be and plans them meticulously in advance...but never thinks of himself as having a choice in the matter, because love is making him do it.
  • Great Expectations: When Miss Havisham falls in love with Compeyson, who takes her money and then leaves her (he was a swindler and a thief), she decides to use her beautiful adopted daughter Estella to wreak vengeance on men. She eventually sees the error of her ways, which leads to an My God, What Have I Done? moment before she meets her end.
  • Used straight in Harry Potter...sort of. J. K. Rowling has said that she thinks of Dumbledore's youthful flirtation with world conquest and Muggle subjugation as the result of his blinding, infatuated love for Dark-Wizard-in-the-making Gellert Grindelwald. Of course, this doesn't acknowledge that the past!Dumbledore we saw in Deathly Hallows was exactly the kind of Machiavellian bastard with a thing for controlling people who would be drawn to that kind of ideology himself. (And if that weren't enough, he's got a tragic backstory involving Muggles attacking his sister for being a witch, an act which effectively destroyed his family and left him understandably bitter.) Dumbledore himself acknowledges his character flaws, which is why he's never sought Ministry offices (the reason for which is something that Harry never quite understands). It's possible that Dumbledore had a crush on Grindelwald that caused them to spend time together, and that he influenced Dumbledore into becoming the Muggle-hating bastard he was until his Cynicism Catalyst prompted his Heel–Face Turn. Inverted with the Big Bad of the series, Lord Voldemort. A running theme in the books is that his evil stems in part from the fact that he can't understand love.
  • Cypher/Mao Fanchu/Wu Zhang's motivation in the H.I.V.E. Series is stopping Overlord because of the murder of his wife. He even goes to the lengths of attempting to kill thousands of HIVE students.
  • "Kissin' Kate Barlow" from Holes, driven by grief over the loss of the man she loved, becomes an infamous outlaw. Her first targets are the racists who murdered her beloved. Previously, she was innocent Katherine Barlow who made delicious peach preserves and taught schoolchildren.
  • Victor Hugo:
    • Eponine in the 1862 novel Les Misérables provided a relatively mild example of this: in love with Marius, the quite literal boy next door, and aware that he was besotted with Cosette, Eponine disguised herself as a boy and lured Marius to the barricade, intending for them to die together. She eventually took a bullet intended for him and died giving him Cosette's letter, though to this day her motives are debated. Considering that Hugo's own daughter Adele became utterly obsessed with a soldier, running away, printing fake marriage announcements, and even trying to drag him to a hypnotist so that he'd marry her, she may have inspired some Truth in Literature on the part of her father.
    • In The Hunchback of Notre Dame, it is only once Claude Frollo falls in lust/love with Esmeralda that the nastier sides of his personality come out. Pretty much every instance of death and disaster in the book occurs as a direct result of his obsession.
  • The Legacy of the Force novels have Jacen Solo going dark for similar reasons to Anakin's. In one novel he flat-out admits he's doing exactly what his grandfather did, but he's confident he can do it right. The irony being, he sort-of unites the galaxy in the end, so he wins after all.
    "Love doesn't lead to the dark side. Passion can lead to rage and fear, and can be controlled, but passion is not the same thing as love. Controlling your passions while being in love, that's what they should teach you to beware, but love itself will save you, not condemn you."
  • C. S. Lewis believed that, without divine grace, human love is ultimately selfish and eventually destroys the object of its affection. In other words, Divine Love Redeems, but Human Love Makes You Evil. This plays out in a few of his novels:
    • In Till We Have Faces, Orual's love for her sister Istra leads her to unintentionally cause Istra to be exiled. At the end of the novel, Orual realizes to her horror how much of her "love" was actually jealousy of her sister and the gods. Istra and the gods forgive her.
    • In The Great Divorce, it's not uncommon to hear damned souls demanding that those they love in Heaven accompany them back to Hell. What makes it worse is that, in this story, there is nothing — besides their own Pride — preventing the damned from being redeemed and entering Heaven themselves. This, however, is not love, as Lewis makes anviliciously clear via his Author Avatar:
      Excess of love did ye say? There was no excess, there was defect. She loved her son too little, not too much. If she had loved him more there'd be no difficulty. I do not know how her affair will end. But it may well be that at this moment she's demanding to have him down with her in Hell. That kind is sometimes perfectly ready to plunge the soul they say they love in endless misery if only they can still in some fashion possess it.
    • In The Four Loves, discussing three out of four of the loves goes into how they go evil.
  • Show Within a Show example: In The Mirador, Mehitabel stars in a play where the villain commits multiple murders to win the heroine's love and tries to justify it by telling her it was "all for you".
  • Adam's fall in Paradise Lost, and thus the fall of all mankind, comes about as a result of his absolute adoration for Eve, who he can't bear to live in Paradise without. As soon as he falls for her, Adam blames Eve for his own decision and he insults her until she bursts into tears.
  • Hester Shaw in Predator's Gold. She sells Anchorage's location to the Huntsmen of Arkangel, out of jealousy for Freya, who she thinks is trying to steal Tom from her.
  • The Reynard Cycle: Reynard's dogged pursuit of the Countess Persephone leads him to sacrifice the lives of several of his companions and murder enemies both real and imagined. When it all turns out to be for naught, things take a turn for the worse.
  • The Rifter: A "Grief Makes You Evil" variant. When Ravishan died, John sank all of northern Basawar in the sea. But then he pulled himself together and began to rebuild the world. Laurie, however, mourning for her husband and child and ruined life, became a true monster, and never recovered. Love on the other hand is a great force for good.
  • K.J Parker's The Scavenger Trilogy: Several characters cause great harm under the influence. Ciartan's obsession with Xipho leads him to kill her unborn child. His love of Xipho and his schoolmates leads to his pivotal betrayal of Tazenticus. Lysalis seems hollowed out by it, and is capable of doing anything in its name, as would her father.
  • The Silmarillion: Maeglin of Gondolin lusts after his cousin, Idril. Since he can't have her, Maeglin ends up willingly betraying Gondolin's position to Morgoth. Notable in that Maeglin was the only elf to ever be sexually perverted. Ever.
    • Celegorm's (implied) planned rape of Lúthien was explained by "love" in the book, although it is debatable whether one may call that "love". "Lust" seems more appropriate.
    • In the lay of Leithian, Gorlim betrays Barahir & co to be reunited with his wife Eilinel. (Also because he'd been tortured quite a lot by that point.)
  • Skulduggery Pleasant: Caelan justifies his murder sprees as this, claiming that the women he stalked and obsessed over seduced him, broke his heart and drove him to violently murder them, it was even his Motive Rant while he was choking Valkyrie, but it's very likely that his "reasons" mostly exist in his head, and he's truly just a severely screwed up individual.
  • In Juliet Marillier's Son of the Shadows, the heroine's rejection of a suitor makes him more and more evil, culminating in several attempts to kill her lover, among other things.
  • One of the main themes of A Song of Ice and Fire is that love isn't much of a motivation for good. Jaime Lannister, Petyr "Littlefinger" Baelish, Lysa Arryn all did some pretty awful things which they claim was motivated by love. It's also at the root of the original civil war against the Targaryens.
    • It's interesting to note that in the case of Jaime, as soon as his near-worship of Cersei begins to wane, his Heel–Face Turn begins.
    • It's difficult to get a solid reading on the motives of Petyr "Littlefinger" Baelish because of all the effort to which he goes to conceal his motives from rival players of the game of thrones, but the going interpretation from what little he's let slip is that he single-handedly instigated a massive civil war, resulting in the suffering and death of millions, just so he could get the husband of his childhood sweetheart disinherited, banished, and (most importantly) get their marriage invalidated. He could then pick her up on the rebound after having gathered enough power and wealth on the side to make a socially acceptable marriage proposal to a Noblewoman of her status. Or, in short, Murder the Hypotenuse turned Up to Eleven. It doesn't end very well for him though, as she also gets killed during the war. He then chooses her daughter instead.
    • Surprisingly, Tywin Lannister may be a partial example (more like Loves Makes You Eviller). He was never a nice guy, but it seems that his wife's death was a Despair Event Horizon which diminished his ability to care even for his children.
  • Star Trek Expanded Universe novel Reunion (featuring characters from the later Star Trek: Stargazer series, although taking place later in the timeline) involves an assassin attempting to kill several characters, while framing Idun Asmund (who was raised by Klingons) of the crimes. In the end, it is revealed that the culprit is Dr. Carter Greyhorse, who blames the characters for the death (accidental) of Gerda Asmund, Idun's twin sister, with whom he was in a secret relationship for 18 years.
  • The Tortall Universe's Provost's Dog (Beka Cooper) series has Tunstall, who joined the dark side in a misguided attempt to secure a future for the woman he loved, Sabine of Macayhill.
  • Trapped on Draconica: Gothon became evil because he was so desperate to save his sick wife that he resorted to dark power. Does this sound familiar?
  • Opaline turns her back on The Ultra Violets after she sees Cheri kissing Albert Feinstein, Opal's crush. It really was the other way around, but she won't hear any of it.
  • The White Queen in The Unexplored Summon://Blood-Sign became evil because of her love for the main character Kyousuke. Initially, she was childishly innocent, to the point of easily making a promise to never hurt anyone, if it meant she could stay with him. However, others coveted her immense power. A number of people pretended to be Kyousuke, which started a chain of events that led to countless deaths. The real Kyousuke was horrified and tried to flee, with the Queen in pursuit. Eventually, he threw himself at her, trying to stop anyone else from dying, but she didn't kill him like he expected. He resolved to never give up until the Queen was destroyed, while the Queen similarly resolved to never give up until they were together again. Then an army approached, intending to kill the Queen. To avoid Kyousuke being killed in the crossfire, the Queen had no choice but to break her promise further and slaughter them all.
  • Tasha Ozera from Vampire Academy, frames Rose for Tatiana's death so she can have Dimitri.
  • In The War of the Flowers, Eamon Dowd's Face–Heel Turn begins with his love for a fairy. This trope is explicitly pointed out during Dowd's Motive Rant directed at the main character, Theo. He claims that he's nothing like Lord Hellebore because while they both did terrible things, Dowd did them all for love. Theo responds that that's the most terrifying thing he's ever heard.
  • Warrior Cats:
    • Ashfur. After his former Love Interest Squirrelflight rejects him, he attempts to murder her father and frame her mate for it, and later, he tries to murder her children by blocking their escape from a raging fire. All so that she could feel the pain he had when she rejected him. He is murdered not long afterward by one of the cats he'd tried to kill. When Jayfeather (another one of the cats he'd tried to kill) sees him in the feline equivalent of heaven, he asks his Spirit Advisor Yellowfang why Ashfur is there instead of in the Dark Forest, where murderers/traitors usually go. Yellowfang's response: "His only crime was to love too much."
    • Mapleshade. She loved a cat from another Clan (which is forbidden), Appledusk, and became pregnant with his kits. Her Clan assumed that the father was a warrior who'd recently been killed in battle (by Appledusk, no less.) When the truth came out, ThunderClan banished her and the kits, and she tried to join her mate in RiverClan. The kits died when trying to cross the flooded river. Appledusk blamed her for their deaths, and also revealed that he no longer cared for her; he'd taken a new mate within his own Clan. She then, in her rage and grief, saw a vision of her three kits and became convinced that they were not at peace, so she murdered the cat that revealed the secret, then the cat who'd first assumed that the father was the deceased warrior, and then Appledusk himself. (She was killed by Appledusk's apprentice and went to the Dark Forest.)
  • This could be a subtitle of Wuthering Heights, although it would tie with Love Makes You Crazy. This obsessive, unhealthy love and infatuation between Catherine Earnshaw-Linton and Heathcliff contrasts with the later romance between Catherine Linton and Hareton Earnshaw.
  • Discussed in The Dresden Files when Harry agrees to serve Queen Mab in exchange for the power to save a loved one. Different characters have different opinions on whether love can lead a person to damnation or save them from it.
    Uriel: Everything else flows from there... Whatever you do, do it for love. If you keep to that, your path will never wander so far from the light that you can never return.
    Mab: So many terrible things are done for love. For love will men mutilate themselves and murder rivals. For love will even a peaceful man go to war. For love, man will destroy himself, and that right willingly.

    Live Action TV 
  • Angel: This is literally the case with Angel.
  • Buffy the Vampire Slayer:
    • Willow in season 6 goes Psycho Lesbian and tries to invoke The End of the World as We Know It after Tara is murdered. Yet she is brought back to normal thanks to The Power of Friendship. There's even more to it than that. Willow goes Psycho Lesbian, sure, but it's a personal vengeance thing, until she absorbs Giles borrowed magic power, at which point she feels all the pain and suffering in the world and decides to put everyone out of their misery.
    • Buffy's first boyfriend, Angel, for whom it was quite literally true. After experiencing "perfect love and happiness" in Buffy's arms, her beau reverted to his evil, soulless counterpart Angelus.
    • Even Spike could fit this trope somewhat. While he was first evil, he slowly fell in love with Buffy and more or less turned good by fighting at her side. When Buffy and him began a purely-sexual relationship, Spike did not stop bothering Buffy to make her upgrade their relationship. She constantly refused and, when she finally put a stop to it, he returns to evil and tried to rape her to show her that she really loved him! Her cutting remark ("Ask me again why I could never love you!") prompts him to switch back to the good side after, but it took defeating demons in Africa to get his soul back and earn a chance at a real Heel–Face Turn based on something other than getting in Buffy's pants.
    • In one episode bewitched girls consider killing Buffy so they can get together with Xander... yeah magic.
    • The argument could definitely be made that Faith fits into this category as well, particularly if one believes - as many do - that the subtext throughout her arc indicated that she had feelings for Buffy . This would strengthen the argument, but even if restricted to purely platonic love, here is this; all Faith ever wanted was to be loved, by the Scoobies, but particularly by Buffy, as is confirmed by the First in Season 7. How does she react when she thinks that she has essentially been rejected by them all? She goes evil. Granted this is not the only force at work here, but the change is at least in part driven by her desire for love.
    • It's very heavily implied that Andrew had a crush on Warren. Practically stated.
  • Game of Thrones:
    • Jaime Lannister pushes a 10-year-old out a window to hide his secret affair with Cersei, even saying, "The things I do for love..." He later assures her that he would kill everyone in the world if that's what it took for them to be together.
    • Cersei Lannister was, like many women at the close of the rebellion, quite in love with Robert when they married, but years of arguments, inattention, his love for Lyanna Stark and occassional Domestic Abuse end in her plotting her husband's death. Her relationship with Jaime doesn't seem to bring out the best in her either.
    • Petyr Baelish's unrequited love for Catelyn feeds his obsession with achieving power over his social betters.
    • Maester Aemon warns Jon that love is the one thing that can make a man ignore his duty.
    • Tyrion has implied that he expects he expects this to happen to him at some point when he remarks that he would kill for Shae and expects he will have to someday.
    • Elaria Sand loses it after watching Oberyn getting his skull crushed by The Mountain, changing her from a lovable Ethical Slut to a vengeful and crazy crusading mistress War Hawk against all the Lannisters.
    • Somewhere between this and Love Makes You Dumb, Jorah Mormont explains that he sold poachers into slavery to finance his beloved wife's lavish lifestyle.
  • Michael in Lost murdered Ana Lucia and Libby and sold out his friends to the Others to save his beloved son Walt, kept as a hostage by said Others.
  • Ianto Jones in Torchwood tricked his boss into giving him a job so he could hook up his potentially murderous girlfriend in the basement and hopefully revert her to human form, and even after she tried killing him, he tried to defend her. She could have killed the planet - he saw what happened with the other Cybermen.
  • Doctor Who:
    • Kassia in the serial "The Keeper of Traken". She desperately wants to stop her husband becoming the next Keeper, because then she would lose him. As it turns out, she succeeds in this. But by then she's not around to see, he still doesn't make it to the end of the serial, and the rest of the Traken Union doesn't outlive her by very much either.
    • Also The Master to The Doctor, according to certain fans.
    • When the power to destroy worlds falls into the hands of a small child who wants his mother. As the Doctor puts it, "There isn't a little boy born who wouldn't tear the world apart to save his mummy. And this little boy can."
    • River loves the Doctor so much that when she's being forced to kill him during a fixed point in time, she refuses, causing time to collide with itself and begin disintegrating. Normally, this would only be a matter of Love Makes You Crazy, but when she finds out what she's done, she not only continues, but claims she'll suffer more than anyone else in the universe if she has to kill the Doctor.
    • Similarly, the Twelfth Doctor loves Clara Oswald so much that in "Hell Bent" (the Series 9 finale) he does everything in his power to save her from her fixed-point death — which happened two episodes prior. While he understands the risks involved all too well, admitting he's going too far, he honestly thinks he can avert catastrophe (and if anyone could do that it would be him), in the process approaching the Moral Event Horizon and becoming Woobie, Destroyer of Time. He has his Heel Realization when he finally realizes that the life he intends to give her isn't what Clara wants, and that he is only hurting her by not living up to his usual standards. In the end, she will live on for a while before returning to the fateful moment, but he loses most of his memories of her and they must be parted forever. For his part, he realizes this is fitting, and becomes a selfless man once more. Note that in his case this trope crosses over with Being Tortured Makes You Evil, as the events of the previous episode "Heaven Sent" resulted in him being Driven to Madness and more willing to become The Unfettered than usual.
  • Babylon 5:
    • Lennier's last act in the series is an attempt to kill Sheridan so Lennier can have Delenn for himself. It goes badly...
    • John Sheridan narrowly avoids this trope... TWICE. When he first sees Mr. Morden come on the station, knowing he had been on the same ship as his wife Anna when it exploded, he has him arrested and held without cause or proof. The act is so much against Garibaldi's principles (who has been known to bend the rules a few times) that he quits. It is only when he is told that there is a greater danger that he snaps back out of his obsession and frees him. The second time, he witnesses Delenn's stabbing and runs down the sociopathic would-be assassin and very nearly kills him... with his bare fists.
      • Given that the latter assassin is a guerrilla under the command of a government Sheridan is at war with, killing him would be perfectly justified.
    • Morden uses this against Londo by murdering his true love Lady Adira and implying that it was done by Lord Refa, Londo's rival:
      Londo: "All I want now is revenge and safety for my people. The rest of the galaxy can BURN for all I care."
    • Depending on how one interprets Delenn's connection with Dukhat, this trope might apply here as well.
  • Chuck: Daniel Shaw was once a loyal CIA agent and a member of Team Chuck, but turns traitor and joins the Ring to avenge his wife's death after finding out the murder was set up by the CIA as Sarah's Red Test.
  • Subverted in the miniseries adaptation of Gormenghast. Steerpike claims everything he has done was for love of Fuchsia, but while he may or may not have felt something for her, this declaration is clearly a lie by which he hopes to further manipulate her.
  • In Noah's Arc, Guy's love for Trey leads him to do progressively crazier things, including setting up a fire for him to put out to look like a hero, and cutting himself and blaming it on Alex. The cross into evil though comes when Guy writes a fake suicide note from Alex, heavily implying that Guy planned to kill him to get him out of the way for good.
  • This was Alpha's motivation for attacking Whiskey after his composite event in Dollhouse. He just wanted Echo to be the best, after all. Really, this is a large part of Alpha's schtick—his break-in near the end of season one was to get Echo out. When he reappears in season two, it's killing all her clients who loved her—or as he put it, loved part of her.
  • In Jekyll, a modern retelling of Dr. Jekyll and Mr. Hyde, it's revealed that the psychopathic Hyde is not a manifestation of all the dark impulses of human nature as commonly believed, but represents the ruthlessness of pure love, prepared to sacrifice anything and anyone for the object of his affection. The Split Personality was created in the first place when the original Dr. Jekyll fell in love with his servant who due to the class difference he couldn't marry. Over a century later, Tom Jackman earns his Split Personality after he and his wife are menaced by a gang of thugs; Tom's frustration over not being brave enough to protect his wife leads the newborn Hyde directly to the gang's leader. Cue Extreme Męlée Revenge.
  • This happened in Charmed a few times. Leo willingly became an Avatar to save his wife and before that, he killed an elder to save his son. Phoebe willingly became the Queen of the Underworld to stay with Cole. And Cole had absorbed all sorts of demonic powers to be reunited with Phoebe. And he's the only one they didn't forgive.
  • EVERY Soap Opera that has turned a beautiful, intelligent woman with numerous other appealing qualities into a psycho bitch hell-bent on doing everything she can, up to and including murder to hang on to a man who doesn't love her, despite the fact that she could easily get another.
  • Samuel Sullivan on Heroes is a mix of this and Ambition Is Evil.
  • Part of the reason Boomer had a Face–Heel Turn on Battlestar Galactica was that Cavil was the only sympathetic shoulder for her to lean on.
  • Oz:
    • Chris Keller kills every guy that Beecher sleeps with, including the guy who murdered Beecher's father, has Beecher murder Schillinger unknowingly, acts overly aggressive with him at times, on two occasions has knocked him out with a blow to the head when Beecher goes against his wishes and later handcuffs him to a chair away from other people where he forces a kiss on him, and finally murders the Aryans so that they don't pose a threat to him or Beecher anymore.
    • As well as Ryan over Dr. Nathan. After she helped him through cancer, he immediately divorces his wife. Later, he forced a kiss on her, paid a fellow inmate to steal her stethoscope, and when she started ignoring him, had his brother Cyril kill her husband. After she was raped, he very quickly murdered the man that did it. It was even said outright that his love for her was more of an unhealthy obsession. However, Dr. Nathan actually falls for him in the end.
  • Stargate SG-1: The Replicator Fifth's obsession with Samantha Carter heightens his reaction to her betrayal, turning him from a nice guy who wants to help SG-1 to a dangerous foe who kidnaps and tortures Sam, tries to trick her into staying with him, and finally creates a Replicator version of Carter to rule the galaxy with him. It doesn't go quite as planned.
  • The Vampire Diaries: Damon Salvatore became the Fully-Embraced Fiend he is today out of a combination of Katherine's Ax-Crazy influence as well as his bitterness and jealousy over her refusing to choose between him and his brother.
  • In CSI many cases were caused because of this trope. Crime shows in general love this. You will never find a crime show that doesn't feature this a few times a season at least.
  • In Once Upon a Time, this has been the motive for virtually every villain so far:
    • Rumpelstiltskin took on his evil powers for the purposes of saving his son from the Oger Wars.
    • The Mirror Spirit was a good guy until he fell in love with Regina, the Evil Queen.
    • Regina herself became evil after the death of her lover, something for which she blamed Snow White.
    • Captain Hook became hell bent on revenge after Rumpelstiltskin killed Milah; Hook's lover...and Rumpel's wife.
  • Seems to be a Central Theme in Once Upon a Time in Wonderland.
    • First, we have Anastasia, whose entire motivation throughout the series has been to correct the mistake she made in abandoning the one she loves. She's done some horrible things. Though evidently nothing bad enough that she isn't fully forgiven by series end and reconciled with Alice and Cyrus.
    • Second, we have Jafar, who craves his father's affection more than anything, and will stop at nothing to get it. Though as it later turns out, he doesn't really love his father at all. He wants to force his father to feel affection for him so that he can break his heart before killing him.
    • Finally, we have Amara, who, after losing her children, became a sorceress with no qualms about killing an innocent man to use his liver as a spell reagent, and turning another man to stone for shiggles.
  • Every other episode of Warehouse 13 has someone abusing artifacts out of desperation caused by love. The major difference between these episodes and ones where the bad guys are truly bad guys is the ones based around love generally don't leave as much of a body count. The first Big Bad's Start of Darkness turns out to have been a misuse of a deadly Artifact that allowed him to save his love from a burning building (meanwhile, Artie, who was also in love with her, was unwilling to cross that line), resulting in another person's death.
  • Walter White of Breaking Bad actually has this as the endearing motive for his actions. His entire journey into meth manufacturing begins because he loves his family and doesn't want to die leaving them with nothing but a mountain of debt from his medical treatments. It later becomes clear this isn't the whole story and Walter is also driven by much darker motives he doesn't want to recognize; he keeps making meth long after he has more than enough money to know what to do with.
  • Uther Pendragon from Merlin started his genocide of every single magic user when one killed his wife Igraine. Even though he had no one to blame but himself.
  • 24:
    • Tony Almeida learns the identity of the man whose actions lead to his family's death and attempts to get close to him so he can kill him in revenge. He does this by murdering the head of the FBI, performing a number of terrorist attacks, and attempting to expose a crowded subway terminal to a lethal pathogen.
    • Jack attempts to assassinate the mastermind behind the death of his love interest in the final season even though doing so would kickstart World War III and recklessly endangers innocent lives in his attacks on the conspirators. And then subverted, as he is talked down when his allies make him realize what the consequences will be; and because they point out his lover wouldn't want this.
  • This has happened a few times in Kamen Rider:
    • Ryuki's Shiro Kanzaki started the Rider War and is just fine with the Mirror Monsters devouring people if he can save his sister. Noble goal, but we're talking a body count in the hundreds.
    • In Wizard, we have the White Wizard and Wiseman, the Big Good and the Big Bad, respectively, who are both Sou Fueki. Apparently, saving your daughter outranks the fact that everyone with magical potential will become a Phantom and everyone without it will drop dead if your spell to steal the mana from everyone in Tokyo goes as intended.
    • In Gaim, Mitsuzane/Kamen Rider Ryugen starts off as The Lancer, but his obsession with protecting his friends (especially Mai, who he has feelings for), leads him to join the villainous Yggdrasil Corporation and become both a Manipulative Bastard and Poisonous Friend.
  • Father Brown: This provides the motive for the murder in "The Crimson Feather". After accidentally declaring her love to the wrong person, the killer is so humiliated by the laughter she received, that she murdered the other person before she could spread the news.
  • Legend of the Seeker:
    • Kieran, a previous Seeker, went mad with grief and started killing innocent people after his wizard had persuaded his Confessor lover Viviane to kill herself so he would be freed from Confession to her (which happened when the pair had sex), forcing his wizard to kill him with his own sword and trap his spirit in his remains as he threatened to wreak havoc in the afterlife unless he was reunited with Viviane. Worse, he possessed Richard's body and got Viviane's spirit to possess Kahlan's, obviously not caring what either of them thought.
    • The Keeper was originally the Creator's lover at the beginning of time, but he grew jealous over the gifts that she gave their children, human beings, including immortality. So he made all of them mortal and introduced suffering to spite her.
  • The popular Dutch series Flikken Maastricht has Jens Bols, who actively kidnaps Eva up to two times, just because he thinks they are similar and that they should marry. He uses her as a Replacement Goldfish for his own wife who disappeared a long time ago. Ultimately, the criminals that are after Jens' money, kidnap her again, just to get that five million bucks out of him. It backfires horribly.

  • Sound Horizon's Elysion Paradise Illusion Story Suite album is full of seemingly nice girls doing really terrible things due to love (like the girl who loves her brother so much that she stabs him to death so they can go to Paradise together, or the one who kills the girl she loves for rejecting her...)
  • The Mountain Goats song 'Love Love Love' is sorta about this. It's off an album about the songwriter's stepfather abusing him as a child; his point was that his stepfather may have done terrible things to his kids, but he still loved them, and love can make you do terrible things.
    Love love is gonna lead you by the hand/Into a white and soundless place/Now we see things as in a mirror dimly/Then we shall see each other face to face
  • Dschinghis Khan's "Der Verräter" (German for "The Traitor") is about a guy, who went AWOL from gate guard duty to see his girlfriend and allowed the enemy to enter the city. Afterwards, he's brought up on charges of treason and sentenced to death by hanging and everybody believes, that him claiming to have been seduced is only a pretext for the collaboration with the enemy and that his real motivation was promises of wealth and honor.
  • Downplayed in Mark Morrison's "Return of the Mack". The song is about a Casanova who fell in love with a woman who promised to never leave him. She did, and left him heartbroken, prompting him to return to his womanizing ways. So it's less "love makes you evil" and more "love makes you kind of a dick".
  • In The Willow Maid the titular willow maid is murdered by a man who claims to be in love with her. After she rejects him, he chops down her tree, and forces her to leave the forest with him. As he wanted to force her to marry him, and it was clear from the beginning that there would not be a happy end, the fact that she turns in a flower and wilts after leaving the forest comes across as Bittersweet Ending. At least she is spared worse.

  • Giuseppe Verdi loved the trope, as proved by:
    • Count di Luna in Il trovatore.
    • Amneris in Aida.
    • Eboli in Don Carlo.
    • Abigail in Nabucco.
  • Gérard in Giordano's Andrea Chenier.
  • Scarpia from Puccini's Tosca is a subversion - it's not love, it's lust, and he was pretty evil to begin with.
  • Claggart in Britten's Billy Budd, if you interpret it as Foe Yay.
  • Alberich from Wagner's Tetralogy "Ring of the Nibelungs". Rejected by the Rhein Nymph Sisters for being a Gonk, he curses love and steals their gold, creating the infamous ring.
  • Monostatos in Mozart's The Magic Flute.

    Professional Wrestling 

    Tabletop Games 
  • In the Fellowship of the White Star event "London Fires," the arsons are caused by a woman who is in love with a heroic NPC who once saved her from a fire demon. She is setting various locations in London on fire in an attempt to meet him again and properly declare her love for him.note 
  • This is yet another trope that the Ravenloft setting was (literally!) built out of. From Strahd von Zarovich's obsession with stealing his brother's fiancee, to Victor Mordenheim's determination to restore his wife's shattered body at any cost, love — or, at least, what villains claim is love — is a far better candidate for the Root Of All Evil than money, in the Land of Mists.
  • In a sourcebook for the Star Wars d20 role playing game this is used as a justification for Jedi not being allowed to love. More often than not it leads to anger, jealousy and the dark side.
  • Warhammer and Warhammer 40,000: the Chaos god of decay and disease Nurgle is the embodiment of the emotion born out of man's reaction to death, usually interpreted as the emotion of love. And indeed, of all the Chaos gods, he's the nicest to his cultists (who refer to him as Papa Nurgle or Grandfather Nurgle), showering his faithful with gifts. Followers of Nurgle then seek only to bring the joy of pestilence and death to the universe.

  • Nessarose, Elphaba's beautiful but unstable sister from Wicked. Her obsessive love for Boq leads her to enslave the Munchkins so he can't leave her. When she discovers he doesn't return her feelings and has really loved Glinda all along, she shrinks his heart so he can feel her pain; Elphaba has to turn him into the Tin Man in order to save him.
    • Later, in the song "No Good Deed," Elphaba's transformation into the Wicked Witch of the original Wizard of Oz is significantly assisted when Fiyero throws himself to an angry mob to save her. She frantically tries to magically protect him from afar, utterly unsure that she is doing him any good. In frustration, she declares that "no good deed will I attempt to do again," and is a Straw Nihilist for most of the rest of the show.
  • One of the oldest deconstructions of this trope occurs in William Shakespeare's Richard III. Richard, claiming that because he is "deformed" no woman has ever loved him; as he sees it, there are but two courses in life for men to take - that of the lover, or that of the villain - and because no woman would ever allow him to be their lover, he must therefore become a villain. This, therefore, turns the trope on its ear, into Lovelessness Makes You Evil, leading to a very Cry for the Devil idealism. (Shakespeare then subverts Richard's excuse by showing him, in the very next scene, successfully wooing the widow of a man he killed.)
  • Mrs. Lovett in Sweeney Todd: The Demon Barber of Fleet Street. Sweeney too, but it's just as much about revenge.
    • Judge Turpin could also qualify, though much like Frollo above, there's more than a bit of lust involved as well.
  • Older Than Feudalism: Medea murdered her brother and betrayed her people for her love of Jason. Then in the play he leaves her, and she goes a bit murderous then as well, though that's more about revenge.
    Medea: Oh, what an evil power love has in people's lives!
  • All the murders in Little Shop of Horrors are influenced primarily by Seymour's love for Audrey.
  • Stephen Sondheim's Assassins, a musical about the men and women who have either killed U.S. presidents or attempted to do so, gives us the examples of John Hinckley, Jr. (see Real Life below) and Lynette "Squeaky" Fromme, who tried to murder Gerald Ford in an attempt to impress Charles Manson. They even have a duet about it: "Unworthy of Your Love."
  • The seventeenth-century English drama The Changeling has this happen with both main characters. Beatrice-Joanna, the daughter of a wealthy nobleman, falls for a handsome sailor named Alsemero, but is betrothed to an older man; she becomes so obsessed with marrying Alsemero that she hires DeFlores, her father's deformed servant, to take care of her fiancee for her. Unfortunately, DeFlores himself is in love with Beatrice-Joanna, and after committing the murder, blackmails her into sleeping with him. It's Beatrice-Joanna, though, who's the more villainous: she's the main instigator of all of the crimes in the play, but even as she confesses her deeds to Alsemero, she cries, "It for your sake was done!"
  • The framing device for Thrill Me is Nathan's parole hearing, where he explains his crimes (theft, arson, murder) as being due to his feelings for Richard.
    But you've asked a simple question
    And I've told you why
    It wasn't on a dare or on a whim
    It's hard to comprehend now
    That the reason why
    Was simply that I went along with him

    Video Games 
  • In Phantasy Star II, Duram turns to crime in an attempt to collect enough money to pay the ransom for his kidnapped daughter.
  • In Dragon Age II, someone is kidnapping women in Kirkwall because they resemble, in some way, the kidnapper's lost love, and is using their bodies to reconstruct her. One of the victims is Hawke's mother, who shares a face with the lost love.
  • Similar to the above Dragon Age II example, there is a side quest in The Elder Scrolls V: Skyrim that involves a serial killer (Calixto) harvesting women's body parts to resurrect his dead sister.
  • Sophia Lamb from BioShock 2 - Not only does she say multiple times that she's trying to kill you and destroy free will because she loves all sentient life, she is willing to turn her own daughter into a soulless, brainwashed monster. Because she believes free will is evil, and by removing her daughter's free will she is "saving" her....rrrrrrrrriiiiggggghhhhtttt...
    • And, it's possible for you, the player, to become this. Your main goal in the game is to get to your "daughter" Eleanor. If, along the way, you choose to make the evil choices, it's all to save her.
  • The main villain of Tales of Symphonia: Divided the world in two and kept both halves in Medieval Stasis for four thousand years while using their populations to make Powered by a Forsaken Child style Metaphysical Fuel so he could fulfill what he thought was his beloved Dead Big Sister's last wish. And on the side, he tried to bring her back; creating an evil religion that sacrificed and experimented on countless more people in order to get her a body compatible for her use. When she finally does return all he gets out of her is a (rather justified) What Were You Thinking? speech before she voluntarily returns to the land of the dead, which sends him completely off his rocker.
    • Then in Dawn Of The New World, there's Decus who joins an Evil Organization to chase after Alice, who doesn't like him one bit, until he dies to protect her. Then she realizes that she did love him, and in a fit of rage fueled by The Power of Love and Metaphysical Fuel, she manages to wield his BFS to fight the new hero, Emil, only to die moments later.
    • This is contrasted to Marta who was the one who killed Alice in the attack above trying to defend Emil. She stops in horror wondering if she's the same as Alice as they'd both went to commit murder for the one they loved. Emil calms her down by pointing out that she did it specifically to save his life while he was being attacked, but Alice did antagonistically by lashing out in revenge.
  • Leon Magnus in Tales of Destiny steals the Eye Of Atamoni and a flying dragon, then betrays the party leading to his death, all in an attempt to keep his maid, Marian, safe after she's abducted. He never regrets his decisions, stating he could bear any curse as long as it was for her sake.
  • The main villain of Tales of Hearts accidentally engineered a parasite that drained his entire planet of life and was stopped by the sacrifice of one of his closest friends, and wants to re-awaken that parasite thinking that he can bring her (and his planet) back. Actually, it'll just eat more planets, but he's too crazy to notice.
  • Aribeth, the initial quest-dispensing NPC of Neverwinter Nights, does a Face–Heel Turn and leads the villain's army against the city of Neverwinter in vengeance for the unjustified execution of her fiancee at the end of the first chapter.
  • In Super Paper Mario, Big Bad Count Bleck was once Blumiere, a young noble of the "Tribe of Darkness" whose romance with a human girl, Timpani, was ended abruptly by his father, who banished Timpani to the farthest reaches of the multiverse. So enraged and despondent was Blumiere that he turned into an Omnicidal Maniac, devoted to bringing about the end of all worlds by carrying out the prophecy in the Dark Prognosticus.
  • Dracula in the Castlevania series suffers from this trope as many as three times.
    • First, according to Lament of Innocence, he first became a vampire to become immortal and curse God's name forever in response to his wife's death.
      • Leon calls out Mathias on this in Lament of Innocence, telling him that Mathias went against what his lover would've wanted him to do (he basically said "did you lover ask you to do this? The Mathias I know would never have loved such a woman!") Leon was understandably pissed off since Mathias' schemes led to Leon's girlfriend being killed by Walter, but was satisfied by simply fulfilling Sara's last wishes.
    • Centuries later, the death of his second true love in a witch hunt convinced him to seek humanity's extinction.
      • This would prove Leon's point again. Lisa explicitly asked for him not to hate humans. Granted, he didn't know her last words till it was too late (but, considering she's a healer who tried to help her village...), but her death is when he starts hating and killing humans. So, basically, Leon's speech could also be a call-forward to Symphony of the Night, and also a glorious note of how History Repeats itself.
    • In the Sorrow games, Soma Cruz can either resist or succumb to Dracula's influence, depending on whether or not he believes that Mina is killed. It's a trick purposefully meant to turn him into Dracula by Ceila, but if it works, it backfires on her.
    • There's also Brauner from Castlevania: Portrait of Ruin, who became a vampire who sought to destroy humanity because his daughters were killed during the war.
    • Add to this the number of protagonists who inadvertently contribute to Dracula's return due to the death or capture of their romantic interests, and one gets the distinct impression that the entire series could have been avoided if everyone could just get over these things.
    • Happens yet again in Lords of Shadow, only this time it's a Belmont who gets screwed over one too many times and turns into Dracula. Said Belmont gets better in the sequel... kind of.
  • It's implied in Clock Tower 3 that his incestuous obsession for his daughter (and later his granddaughter) was what originally turned Lord Burroughs into the Big Bad of the game.
  • Both played straight and mocked in Metal Gear Acid 2, where the token Evilutionary Biologist turns out to be attempting to reproduce his dead wife's brain in a little girl, bringing her 'back to life' - and is convinced that doing so would turn her into an all-three-faces-of-Eve-at-once God figure (and, just for kicks, start a nuclear war to clear out room for his kingdom). It's mocked when Third-Person Seductress Venus says it's so romantic that someone would do all that for love, after which Snake points out that it's probably the opposite of romance, and quietly marks her down as a Yandere.
  • In the PlayStation game Valkyrie Profile, Lezard Valeth kidnaps his old teacher's husband, turns him into a hideous monster, gets the monster to kill said teacher, murders multiple elves to make a homunculus that appears to be around ten years old, and tricks one of his old classmates into killing themselves by becoming a Human Popsicle, so that he can force the main character to incarnate into flesh and marry him. When that doesn't work, should you earn the best ending, he deliberately kills himself to turn into a spirit being like those the main character leads about, allies himself with a vampire, kills the main character's older sister, and ensures Odin has no chance of surviving The End of the World as We Know It. To top it all off, he gets away with it all, even though he doesn't succeed. His lack of success is the only thing keeping this editor from copying this entry and placing it right in the entry for Magnificent Bastard.
    • And that's just in the first game. In the sequel, he goes back in time, captures the soul of the first game's protagonist's sister, uses it to capture the soul of the king of the gods, and steals a Cosmic Keystone to create a new world, all to get the attention of the goddess he's obsessed with. Although this time he doesn't get away with it.
    • You could make a compelling argument that this happens to Lenneth, despite it being portrayed positively and causing the best ending.
      • If Lenneth doesn't pursue her love of Lucian, then everything goes incredibly well and you win Ragnarok with no casualties.
      • If she does pursue her love Loki kills most of the gods and destroys all of creation. It got better though, which is the only redeemable factor. Even so, despite being less spectacular the end result from the B-Ending is better than the love story A-Ending.
  • In The World Ends with You, Beat becomes a Reaper at the end of the first week, believing that he can become the next Composer and bring his erased sister Rhyme back. His evil is limited to attacking Neku a few times, as he never erases any other players. His disgust over what the Reapers want him to do leads to a Heel–Face Turn.
  • Used by Raphael Sorel in the later Soul Calibur games, where he essentially tries to infect the world (with his plague that causes suspiciously vampiric traits) for a little girl, his adoptive daughter Amy. How far this love goes is up to you.
  • In the second episode of Trauma Center, Patrick Mercer's whole reason for researching Neo-GUILT is to find a strain that allows for quick regeneration and bring back his comatose wife Tracy. When Bythos doesn't work as expected and puts Tracy's life in danger, Mercer refuses to give up and tries another strain, the dreaded Aletheia, by first experimenting it on Ms. Mayuzumi. Once again, this fails horribly, and Mercer ends up getting killed by U.N. soldiers when he tries to bring everyone down with him.
  • Partially played straight in Final Fantasy IV, as no-one's entirely sure how much of Kain's betrayal is due to his unrequited love for Rosa and how much is due to Golbez's mind control. He later admits that he's not entirely sure either.
  • Shadow of the Colossus plays it fairly straight, depending on where in the Alternative Character Interpretation you fall. Wander's whole motivation for coming to the Forbidden Land, making a deal with a dubious sealed entity, and slaughtering peaceful giant creatures is to revive his dead love. Considering the manual states Wander traveled for 'many moons' to reach the Forbidden Land, it's an awful long way to go, suffering the discomfort of horse riding for extensive periods, for someone one hates. Regardless of whether it's due to being a relation, friend or lover, it's simply a lot easier for people to think that Wander went through all that for love.
  • Fire Emblem is pretty fond of this one:
    • Mystery of the Emblem's Hardin fell into despair after finding out that his longtime Bodyguard Crush and newly-married wife Nyna didn't truly love him back, leaving him open to be corrupted by the Darksphere.
    • Genealogy of the Holy War's Arvis loved Deirdre so much he brainwashed her into loving him and killed her husband Sigurd out of fear that she might remember him.
    • Blazing Sword's Nergal originally wanted to bring back his dead wife, hence his obsession with harnessing the power of the dragons and delving into dark magic. It eventually stole his soul and transformed him into the power-mad Big Bad of the game. Averted with Dorcas; he joins a gang of bandits to earn money for medicine for his Ill Girl wife, but you can have Lyn talk some sense into him, tell him that the wife is her protegé now and convince him to join her side.
    • Fire Emblem: The Sacred Stones has Orson (he betrayed his country to have a chance to revive his wife Monica, ex Ill Girl who died prior to the game events., General Carlyle (Queen Ismaire's long-time Stalker with a Crush) and Prince Lyon (he adored both Eirika and Ephraim and was at the same time jealous of them since he was an Ill Boy, which contributed to his madness later).
    • Path of Radiance has Ena, who was fighting for Daein in an attempt to save her boyfriend Rajaion, who was captured by Ashnard and then turned into his mount. This also causes her grandfather Nasir to betray Crimea.
    • Radiant Dawn has Almedha, who is willing to sacrifice an entire country to save her son Pelleas after his Deal with the Devil.
  • Jolee Bindo of Knights of the Old Republic, four thousand years before the events of Star Wars, knows that the Jedi of his time are shifting to the view that Love Makes You Evil, and having lived alone in the forest for twenty years thinking back, makes the case to the player that this isn't so.
    "Love doesn't lead to the dark side. Passion can lead to rage and fear, and can be controlled, but passion is not the same thing as love. Controlling your passions while being in love, that's what they should teach you to beware, but love itself will save, not condemn you."
    • Bindo's observation comes from some hard experience. He was too head over heels with his wife to see fault in her, and trained her as a Force-user against orders. She eventually ended up joining Exar Kun's army. He also mentions knowing Nomi Sunrider, meaning he probably also heard about what went down with Ullic.
    • Also, part of the reason Bastila turned to the dark side (at least if the player is male) was that she was terrified of falling in love with him.
  • Nadia Grell in Star Wars: The Old Republic agrees with Jolee three hundred years later, and writes the following message to the Player Character if he chooses to romance her:
    I've been meditating on something. If we marry and start a family—yes, I know things are hectic right now, and there's a lot of decisions to be made, but if we ever do—I wouldn't want to keep it a secret. Almost everything I've studied about the "perils of love" seems to be written by Jedi who've never experienced it themselves. They talk about "uncontrolled passion" and the "fear of loss" like they're poison. But these Jedi never discuss devotion, patience, and compassion. Love's taught me more about those than the rest of my training combined. Those Jedi just dismiss love as "obsession," when love's the opposite and they don't seem to know it. If the Masters are going to claim that emotional attachment is flat-out wrong, I want to know that they've experienced it, and still think that way. Love can make a Jedi less selfish, more humble and more devoted. We're the proof. I wouldn't want to hide that from anyone.—Nadia
  • A quest chain in World of Warcraft has you track down old journals and records and undelivered letters to piece together how one Stalvan Mistmantle fell for a girl he'd been hired to tutor and murdered her, along with her whole family, when she didn't requite him. In the new expansion, one of the wishing coins you can fish out of the Dalaran fountain seems to indicate he first looked for a Love Potion:
    "You mages refuse to provide me that which hastens the inevitable fate of two people in love, when only one is too naive to see it. I wish you all ruin."
    • The root of Fandral Staghelm's descent into evil is the death of his son in the War of the Shifting Sands. Xavius thus manipulated him into grafting a corrupted twig onto Teldrassil by using an image of his son.
      • Tragically repeated in the latest patch. One of the more prominent flame druids, Leyara' backstory reveals that she was in love with Fandral's son, as well as the bearer of their child, and the dual losses of both to tragic circumstances made her insanely vulnerable to following Fandral right down into the depths of Ragnaros-based corruption.
  • Alma from F.E.A.R. is pretty much like this. Then again, if you don't wish to be loved by her, she'll just rape you.
  • Odin Sphere:
    • The King of the country of Valentine had a daughter who he treasured above all else. So much that he felt betrayed beyond all reason when she fell in love with the king of the enemy kingdom and became pregnant with twins. He made life a hell for his grandchildren, and eventually strangled his own daughter, whom he said he treasured so much he wouldn't let rain fall upon her, with his bare hands. He was killed in a magical explosion in a war, but when he reappeared years later, having bargained his way out of the Netherworld, he effortlessly reduced his confident, self-assured granddaughter to being both paralyzed and trembling with open fear—just by talking to her. He also hatches Leventhan, the Dragon which will help bring about Armageddon and does many other terrible deeds, while, at some level, hating himself for all that he's done. His self-loathing is to the point that in a candid moment, King Valentine begs his daughter's lover to crush his undead form and stop him now.
    • Another love-related emotional scar happens to the Black Knight, Oswald. Oswald is a human raised by a Fairy noble, Melvin, who he loves as a father and would do anything for without hesitation. Melvin doesn't return the feeling, and, as he's dying at the end of a failed coup, freely admits that Oswald was only an object, a tool to help Melvin gain the throne of the fairy nation. Ever after, Oswald reacts strongly—sometimes with lethal violence—whenever he thinks someone is thinking of another person, or even herself, as a mere thing.
  • Magus of Chrono Trigger - he in fact doesn't give a rat's ass about world domination as is implied in the early game, and is instead single-mindedly pursuing revenge on Lavos over his sister, with no regard for the well-being of anyone else in the world.
  • Shadow the Hedgehog in Sonic Adventure 2. After he loses Maria, he promises revenge, and mistakes Maria's last wish for happiness, as the other way around. He tries to destroy the world, and it's only after a talk with Amy, he realises his mistake, and corrects his mistake. Shadow in his own game can go either way. If gone down the dark side, Black Doom revisits Shadow's memories of the attack on the colony, and can than change his ways, or go insane with power and destroy the world!
  • Viking: Battle for Asgard: Rakan fell in love with Freya and was subsequently rejected by her. In her defense, the narrator explains that mortals are rather fragile creatures and a relationship with a God would probably kill them.
  • Kingdom Hearts: Riku. Obsessive need to "play hero" with an unconscious Kairi + an equally obsessive rivalry with Sora = basic premise of the first game.
  • In Professor Layton and the Unwound Future, it's revealed that the reason Don Paolo hates Layton so much is over a woman at their college, though Layton was rather oblivious to the his feelings about the subject at the time. Specifically, Claire and Layton were a happy couple, and Paolo couldn't stand to see her with him. One of that game's antagonists was also driven by his feelings for the same woman, though his hatred is not so much at Layton as the one responsible for her death.
  • One of the main themes of Rule of Rose could be said to be "love screws you up, and makes you treat others horribly". Most notably Gregory going crazy over the death of his son Joshua, and becoming the serial kidnapper and killer known as the Stray Dog, as well as Wendy whose innocent children's love with Jennifer is the sweetest thing ever, up until she thinks that Jennifer loves her dog more than her, and has him killed, and that's just the start.
  • Adele from Arc Rise Fantasia takes this to extremes, becoming a Yandere vampy high priestess of a Religion of Evil upon learning that she was the hero's Unlucky Childhood Friend.
  • In BlazBlue, Tsubaki Yayoi is tricked by Hazama to believe that her old school friend Noel stole away her chance to be with her Love Interest Jin Kisa ragi. She ends up performing a Face–Heel Turn and attempting to kill Noel.
  • In Cursery: The Crooked Man, Count Blaise Morellus is so in love with his fiancee that he tries to lock her in their chateau at all times. When she escapes one night, his attempt to get her back leads to her death from falling off a cliff. Driven insane by grief, he accepts a cursed gift from Mother Goose and becomes the Crooked Man, kidnapping and killing young women in hopes of finding his reborn fiancee.
  • In European Mystery: Scent of Desire alchemist Gaston's wife was accidentally disfigured by an explosion in his lab, so he started kidnapping and killing young women so that he could use their essence in a potion to restore her beauty. She rejected him when she found out what he did, driving him even more insane.
  • Legend of Mana runs on this trope:
    • In the Jumi arc, Alexandra turns on her own race to save Florina, bringing them to near-extinction in the process.
    • In the Dragon arc, Larc made a Deal with the Devil to gain more power to be able to protect his sister, Sierra.
    • In the Gate To Heaven arc, the whole plot is kicked off by a Love Dodecahedron between Irwin, Escad and Matilda.
    • There are other smaller examples that border between this and Love Makes You Crazy... or, at the very least, Love Makes You a Jerkass. Somewhat justified in-universe, as it's stated that Mana Goddess is love, and she was corrupted and turned evil.
  • Love is one of the central themes in Mask of the Betrayer, the expansion/sequel to Neverwinter Nights 2. Putting aside more exotic variants like the love between man and god, the entire plot and background of the game, including the horrible fate that befalls the protagonist right at the beginning, occurred because Akashi and the Founder were in love. Myrkul finds it amusing.
    "Only love could be so cruel, I think."
  • Hyrule Warriors: This is primarily the motivation of Cia, who was originally a sorceress at the service of good to watch over the Triforce, but she fell in love with Link, and became jealous that he was always destined to be with Princess Zelda. This made her an easy prey for Ganondorf's corruption, and also caused her good side to split off of her, becoming Lana .
  • House of the Dead 3 reveals that the reason why Curien created the zombie serum was because he was looking for a cure for his deathly ill son, but eventually this drove him insane enough to become the Big Bad of the original game and (debatably) 3.
  • In Immortal Love: Letter From the Past Count D'Morten marries a string of women so that he can use their souls to bring back his true love, who died of plague before they could get married.
  • In Immortal Love 2: The Price of a Miracle Baroness von Croyts tries to sacrifice several dozen people to an evil spirit in exchange for it healing her crippled son.
  • In Reflections of Life 3: Dark Architect Jonas gives the Dark Ruby to evil deity Nox in exchange for the promise to revive his late wife Melita. Nox technically keeps said promise - by using her body as a vessel.
  • In Star Trek Online, this is the fate of Noye, the Big Bad of the Temporal War arc. In another timeline, he was a scientist who aided in rebuilding Annorax's Temporal Warship to battle the Iconians, tempered by his wife. However, in trying to alter time/space, the heroes, player included, accidentally created a timeline where the Borg assimilated Romulus instead of the Hobus Supernova destroying it. They attempt to reset it, but doing so altered time so that Noye's wife's race would be wiped out — in actuality, they became the Sphere-Builders — and the temporal shielding ended up failing thanks to the Borg attacks. While investigating the data inside the ship after the timeshift, Noye learned of his wife and that she was pregnant with his child when the changes occurred. He blamed the Federation for this and sought to punish them for their actions.

    Visual Novels 
  • Denny and Capek, the first two antagonists of Shikkoku no Sharnoth. The latter is necromantic, and the former has some twisted motivation about becoming king in order to win love.
  • Hatoful Boyfriend has a route called "Bad Boys Love". Why is it called that? Most likely because it's about the human protagonist being Killed Off for Real, her main love interest being traumatized to hell and back, and the genocide of the entire human race being set up all because of Doctor Shuu's unrequited love for Ryuuji Kawara that caused him to do his best to fulfill his promise to said love to fulfill any wish of his son in the best way he knew how. Of course, Doctor Shuu wasn't the most stable of creatures to begin with, but it doesn't change the fact that none of this would have happened if he hadn't loved Ryuuji enough to take his promise to him so horribly seriously.
    Angie Gallant: All he has done, he has done for love. HORRIBLE HORRIBLE EVIL UNEARTHLY INFERNAL LOVE.
  • Roa of Tsukihime was apparently a very pure and probably decent person before apparently falling in love with Arcuied at first sight. He decided it was hate for some reason, so he tricked her into drinking his blood, making him a Dead Apostle and making her kill off all the other True Ancestors. Apparently all he wanted was for him to like her...
    • To expand on that, Roa was a completely pure priest and member of the Church's Burial Squad. He was doing some research on immortality until the point where he first saw Arcuied. The moment he saw her, he fell in love, but because until then he had never felt either love or hatred, he was confused. Thus, he decided that the pain in his heart must be hate; It's actually quite a tragic chain of events.
    For the first time since he was born. Probably, no definitely, the only time in his life. -Michael Roa Valdamjong fell in love with that white woman- "————" This is the first time. Not an impulse, but truly Roa's heart. The only remaining emotion. Roa's personality had long died, but it continues to exist without disappearing, that eternal memory. "?? I, see." That's why—-he hated Arcueid so much. The woman who stole his purity. Just an instant. He only saw her for an instant, but his heart was stolen. That hated True Ancestor that caused his purity to fall. That existence. He hated everything about that white vampire princess. "?? What a mistake." What a mistake it was. Roa hated her so much that he reincarnated so many times and always waited for Arcueid to come pursue him each time. For that, he did anything. He deceived Arcuied, fooling her when she didn't even know she was a vampire, and let her suck his blood. Becoming a dead apostle of Arcuied, he used her power to destroy the remaining True Ancestors, and waited for her. Why did he not understand? The hate that caused him to reincarnate and wait for Arcueid. That isn't hatred. The man called Roa was so pure, he didn't even understand his own emotions. To think about someone else so much it makes you go almost crazy. That feeling is very similar to hatred. But, merely a single word. If this man called Roa could have been told his feeling was love, he wouldn't have made this mistake—-
  • Caster from Fate/stay night. At one point in UBW her arrogant, calculating mask slips and she's absolutely scared to death about her prospects. She's started doing horrible things, much worse than she did as Medea in pursuit of a goal she doesn't believe is actually possible. It's not helped along by Kuzuki's incredibly emotionless behavior.
  • This and Idiot Plot are the main tropes leading to the Bad Ends in School Days. Well, those of the anime and manga adaptations anyway. The bad endings in the original Visual Novel are entirely avoidable.
  • Higurashi: When They Cry gives us a case of psychosis and mass murder over a bad case of one-sided Love at First Sight. And psychosis and murder over brotherly love. Twice. Essentially, Love Makes You Evil and crazy. This is played straight with Shion, but subverted with Tomitake, who is horrified at Takano's plans.
  • In Sunrider, the Prototype named Alice was taken in by a benevolent revolutionary called Arcadius. Alice fell in love with him, but when Arcadius was killed by his own followers for trying to stop them from butchering a helpless man in cold blood, she snapped, deciding that Humans Are Bastards and deserve to be wiped out in revenge for Arcadius’s senseless death. She and the other Prototypes then took up his identity, becoming the tyrannical Veniczar Arcadius seen in-game.
  • Doki Doki Literature Club! has Monika, the club president. She is aware of the fact that she is a character in a visual novel and knows about the existence of the player, who she becomes obsessed with. So much that she makes the character flaws and issues of the other three girls even more problematic than they were before in order to make them "unlikable" and when that doesn't work, she straight up erases them from the game.

    Web Comics 
  • In Sluggy Freelance, Oasis's love of Torg has taken her into serious Yandere territory, complete with trying to kill anyone she sees as a rival for Torg's affection (including chocolate ice cream), chaining Torg up so she can force him to marry her, and at one point planning to sew herself to Torg with industrial strength cable so they can never be apart. As seen in the "Phoenix Rising" arc, when she's not actively pursuing Torg she's ... well, not exactly good, but definitely more of an Anti-Hero than a Villain.
    • However, in Oasis' case, her insanity is due to her strange and large unrevealed abilities, which allows her to be resurrected from death, but radically alters her personality Solomon Grundy style; she could be completely Ax-Crazy one incarnation, and rational and contemplative the next. On the other hand, before meeting the heroes she was mind controlled by a villain, whose brief order to love Torg has been thought to have conflicted with later orders, which is thought to be the root of her insanity in the first place...
      • Even though Oasis herself came up with the idea, it's not at all clear she actually changes personalities between incarnations, as opposed to just as a reaction to different events and circumstances as part of her instability.
    • There was also the "Love Potion" arc, where the titular Love Potion brings out the most violent and destructive side of love in everyone it's used on.
  • Gunnerkrigg Court:
    • Even in a world where there aren't any outright evil characters, love can make you do evil things. Zimmy loves Gamma more than anyone or anything else in the world; so to make sure Gamma never leaves her side, Zimmy intentionally mistranslates what her peers say, to convince Gamma that all the other students think she's stupid and ugly. Yes, Word of God (specifically The Rant below this page) confirms that this is intentional:
      "Zimmy is straight up lying. She knows the best way to keep a friend is to make them think everyone else hates them."
    • Diego. Dear God man you made the robot cry. And sent the one you love to her death.
    • And Reynardine's backstory, when he fell in love. . . involved killing someone.
  • Smiling Man from The Crossoverlord was a hero, who travelled through Alternate Universes with his beloved wife, until something went wrong, and she started to merge together with all her alternate counterparts, including evil, sick and dead ones. This forced guardian of The Multiverse to kill her, which drive her husband crazy and turned him into a sick mix of Slasher Smile, The Chessmaster, Emperor Scientist and Multiversal Conqueror.
  • The Order of the Stick gives us Vaarsuvius's soul-splice arc. Although lust for power and control had a big influence on the eventual decision to take the fiend's deal, the initial motivation for contacting them truly was out of fear for Inkyrius and the children.
  • In Collar 6 this seems to have happened to Trina.
  • Spacetrawler:
    Growp: You're like a work of art, Emily. Battling you fills me with emotion. I've never met someone who could match my ferocity, my brutality.
    Emily: If you adore me so much, stop trying to kill me.
    Growp: You don't understand, do you? To kill you would complete this piece of art, would be an expression of life, of being. And your death can only be art if the kill is made by the master skill of a hand as poetic as mine.....Grrr! What I'm saying isn't coming out right, what I'm trying to tell you is... Is that... I... I love you.
  • In Haru-Sari, we have Chi-Min, who could've healed June's Calphanika's, but because he wanted her to need him. Alberich may also count, he stated that'd he'd do anything for Phoenix. ANYTHING.
  • Lana from MSF High, to the point she beats up anyone who makes eye contact with Donovan.
  • Aaronev Wilhelm Sturmvoraus from Girl Genius. Considering his family's history, he probably wasn't the best or the most sane person around before he met Lucrezia Mongfish, but it was his obsessive love for her that made him even more crazy and ruthless, to the point he sacrificed possibly hundreds of young girls (including his own daughter) to bring her back.

     Web Original 
  • Dr. Horrible's Sing-Along Blog is about a comically ineffectual supervillain who is constantly humiliated by his Arch-Enemy, Jerk Jock Captain Hammer. Dr. Horrible doesn't truly start to turn evil until Hammer steals his would-be girlfriend, Penny, making it personal and driving him to attempt to Murder the Hypotenuse. Nice Job Breaking It, Hero!.
    • And then the Bittersweet Ending reveals that, after his weapon exploded and killed Penny, Doctor Horrible has become even more evil.
    "And I won't feel...a thing..."
  • Atop the Fourth Wall: "What these comics are trying to tell us is that love ultimately leads to death, destruction, and the devil. In other words, love no one. Ever."
  • The Nostalgia Chick's "love" for Todd in the Shadows. Nella (dressed up as a nun) summed it up best when she said God would judge the Chick harshly for how low she's fallen.
  • Sailor Nothing: the Dark Queen unintentionally created the Yami-gaia in an attempt to save her lover from dying of consumption.
  • Zig-Zagged in Tasakeru. In the Mythology, two of the settings death-gods come about from mortals corrupted by unrequited love (The Scarred One, who had the good part of his soul die upon being rejected by the object of his affections and subsequently being disfigured by her lover, and Aconite, who was so desperate for the perfect husband she offered to submit to him utterly and became the embodiment of decay when her sisters slapped her with The Punishment), while in-story, love triggers two of the main characters ascension to demigods.
  • Twilight of Friendship is Witchcraft is already unstable, but her love for her adoptive brother Francis drives her to kill off his fiance and brainwash him into requiting her feelings.
  • In Worm, Trickster betrays his teammates for Noelle, his ex-girlfriend who had gone insane and become an Omnicidal Maniac.

    Western Animation 

    Real Life 
  • John Hinckley, Jr., who shot Ronald Reagan to impress Jodie Foster. It didn't work.
  • The infamous Long Island Lolita case of Amy Fisher. A sixteen year old girl who shot Joey Buttafuoco's wife in the face. Fortunately, she survived. Joey Buttafuoco was having an affair with the teenage girl, despite being twice her age. The case got national attention during the early 90s and many made-for-television movies were created based on the case. These films were famous for starring known eye-candy as Amy Fisher. For example: Alyssa Milano and Drew Barrymore.