History NightmareFuel / Durarara

** If going by the anime, ''Seiji himself knows this.'' And he's ''totally okay with it, too.'' On the upside, it does seem to imply that their relationship is a genuinely happy one. Or that Seiji has StockholmSyndrome.
*** Is it possible they BOTH have StockholmSyndrome?

* The fact that [[HeadlessHorseman Celty's headless.]] [[NightmareRetardant Mitigated slightly]] by her {{Adorkable}} personality as well as the fact that she's the OnlySaneMan of the entire cast of DysfunctionJunction.

** Again, [[https://i.imgur.com/5HlECIL.jpg it's worse [[https://i.imgur.com/9EdUNLX.jpg in the manga]]. Warning: NOT for the weak at heart.]]

* Mika Harima's stalking is much creepier in the manga. We're able to see her stalk him in public, probably about a mere meter away and Seiji's thoughts of how disturbed he is by all it. They actually interact through his locked apartment door, Seiji attempting to deter her by shouting how he already has a girlfriend, and the sinister expression Mika has while saying how she doesn't mind because her love for him is real. Even the threat of calling the police doesn't stop her. Several minutes later announcing her presence via an unlocked window. Even with Mika's promise she won't say a word, Seiji smashes her head in with a bat. It's no wonder the anime decided to edited it.

** Taken UpToEleven in the novels and the manga. His extremely sadistic facial expressions in the latter are ''[[NightmareFace terrifying]]''.

* Saika, a {{Yandere}} DemonicWeapon, that loves humanity. And the way Saika's children are made? By taking control of someone who so much as touches her, she forces them to attack and impregnate any human unfortunate enough to cross their path by slashing them while raving about love like an insane lunatic. In a sense, she has a huge Rape Is Love mentality. Additionally, the wielders of Saika can equally as terrifying as the sword herself.
** Haruna Niekawa. Without a shadow of a doubt! She gives the term {{Yandere}} new meaning! Once she becomes possessed by Saika, she slashes up anyone she can to spread Saika's love, including Takashi Nasujima, the [[AssholeVictim poor bastard [[HotForTeacher she's in love with]].]]

* [[BewareTheNiceOnes Mikado and by that token, [[CuteAndPsycho Aoba.]]]]

* Ran Izumii. He's threatened at least two women with rape, and it's heavily implied he raped his little brother, Aoba.

** [[spoiler:Except after Shinra got stabbed by Saika and then kissed in front of her. She completely turns into this mass of shadows and seeks to get him back, turning into a true monster until she can calm down.]]
* Shinra's pretty creepy as well. He flat-out admits that he doesn't care if all the humans on the world were killed, as long as Celty is safe.
* Episode 2, "A Lie and a Truth". People who were trolled or scammed online and nearly paid their lives for it will understand.
* In the episode "Takes A Sudden Turn", during a forum [[spoiler:Saika induced victims]] start posting various disturbing comments, and the "trolls" can't be blocked off the forum. Suddenly the comments from the trolls start to rabidly post the same comment over and over while Kanra and all the others on the forum are noting its creepiness factor. What did the comment say? "Mom. Mom. Mom. Mom. Mom." This was going on while Anri was getting beaten up by several students. To make matters worse, the Slasher shows up....

** Taken UpToEleven in the novels and the manga. His [[http://i23.mangareader.net/durarara/4/durarara-1196081.jpg extremely sadistic]] [[http://i18.mangareader.net/durarara/4/durarara-1196089.jpg facial expressions]] [[http://i5.mangareader.net/durarara/4/durarara-1196083.jpg in the latter]] are ''[[NightmareFace terrifying]]''.

* [[spoiler:Erica and Walker's... [[TortureTechnician other hobbies.]]]]
** [[spoiler:Again, [[https://i.imgur.com/5HlECIL.jpg it's worse]] [[https://i.imgur.com/9EdUNLX.jpg in the manga]]. Warning: NOT for the weak at heart.]]
** The worst part of it, in the anime at least, is that [[spoiler: while Erika and Walker are getting ready to do their thing, they're told not to use gas in the back of the van again (implying that they've done that at least once, and probably more times than that, if there needs to be a repeated warning). And they start brutalizing some poor schmuck while their friends just stand off to the side and drink milk]].
* [[spoiler: Saika, a {{Yandere}} DemonicWeapon, that loves humanity. And the way Saika's children are made? By taking control of someone who so much as touches her, she forces them to attack and impregnate any human unfortunate enough to cross their path by slashing them while raving about love like an insane lunatic. In a sense, she has a huge Rape Is Love mentality. Additionally, the wielders of Saika can equally as terrifying as the sword herself.]]
** Haruna Niekawa. [[spoiler: Without a shadow of a doubt! She gives the term {{Yandere}} new meaning! Once she becomes possessed by Saika, she slashes up anyone she can to spread Saika's love, including Takashi Nasujima, the [[AssholeVictim poor bastard]] [[HotForTeacher she's in love with]].]]
*** In the anime she shows up at Anri's apartment all [[ThousandYardStare all vacant eyed]]. Scary? Yeah. In the manga, Haruka presents herself as a normal and stable girl when she visits Anri's apartment. [[spoiler: However, midway through their conversation about Nasujima, Haruna's demeanor changes to the the unhinged {{Yandere}} we all know and fear. It's just as, if not more, unsettling.]]
** Next is Anri. You normally wouldn't think a cute, seemingly emotionless ShrinkingViolet would be dangerous, but[[spoiler: she unfortunately has Saika in her head, telling her to cut everyone she meets. [[FridgeHorror How often does that voice tell her to cut Mikado, Masaomi, and everyone else she meets?]] It's a good thing she knows how to resist the temptation to cut them, otherwise, she might become much worse than Haruna.]]
* [[spoiler:[[BewareTheNiceOnes Mikado]] and by that token, [[CuteAndPsycho Aoba.]]]]
* [[spoiler:[[ColdBloodedTorture Earthworm.]]]]
* [[spoiler: Ran Izumii. He's threatened at least two women with rape, and it's heavily implied he raped his little brother, Aoba.]]

** And then, after it's revealed that Mika is in fact Seiji's stalker and not a human body with a different head attached to it, they stay together [[spoiler: even though Seiji keeps telling Mika that he's only staying with her because her face looks like the random head he found so many years ago, and that if he can be reunited with it, she's history]]. And she just eats this up for some reason.

*** In the anime she shows up at Anri's apartment all [[ThousandYardStare all vacant eyed]]. Scary? Yeah. In the manga, Haruka presents herself as a normal and stable girl when she visits Anri's apartment. [[spoiler: However, midway through their conversation about Nasujima, Haruna's demeanor changes to the the unhinged {{Yandere}} we all know & fear. It's just as, if not more, unsettling.]]

* The fact that [[HeadlessHorseman Celty's headless.]] [[NightmareRetardant Mitigated slightly]] by her {{Adorkable}} personality as well as being the OnlySaneMan of the entire cast of DysfunctionJunction.

* The fact that [[HeadlessHorseman Celty's headless.]] [[NightmareRetardant Mitigated slightly]] by the fact of her being {{Adorkable}}.

* Izaya, [[DracoInLeatherPants once you get over his charm.]] He can break you with words and do it while claiming to love humanity. And heaven help you if he actually ''hates'' you.

* Shinra's pretty creepy as well. He flat-out admits that he doesn't care if all the humans on the world were killed, as long as Celty is safe. Worse, he actually admits it.

* [[spoiler: Saika, a {{Yandere}} DemonicWeapon, that loves humanity. And the way Saika's children are made. By taking control of someone who so much as touches her, she forces them to attack and impregnate any human unfortunate enough to cross their path by slashing them while raving about love like an insane lunatic. In a sense, she has a huge Rape Is Love mentality. Additionally, the wielders of Saika can equally as terrifying as the sword herself.]]
** [[spoiler: Haruna Niekawa. Without a shadow of a doubt! She gives the term {{Yandere}} new meaning! Once she becomes possessed by Saika, she slashes up anyone she can to spread Saika's love.]]
*** In the anime she shows up at Anri's apartment all [[ThousandYardStare all vacant eyed]]. Scary? Yeah. In the manga, Haruka presents herself as a normal and stable girl when she visits Anri's apartment. [[spoiler: However, midway through their conversation about Nasujima, Haruna's demeanor changes to the {{Yandere}} we all know & fear. It's just as, if not more, unsettling.]]
** Next is Anri. She's a seemingly EmotionlessGirl [[spoiler: because Saika is in her head, telling her to cut everyone she meets. [[FridgeHorror How often does that voice tell her to cut Mikado, Masaomi, and everyone else she meets?]] It's a good thing she knows how to resist the temptation to cut them, otherwise, she might become much worse than Haruna.]]

* [[spoiler:Anri, Saika and Saika's children.]]
** [[spoiler: Saika also has a huge Rape Is Love mentality.]]

* [[spoiler: Haruna Neikawa. Without a shadow of a doubt! She gives the term {{Yandere}} new meaning!]]

* Anri. She's emotionless because there's this crazy weapon in her head, telling her to cut everyone she meets. [[FridgeHorror How often does that voice tell her to cut Kida and Mikado and cut everyone else she meets?]]