History NightmareFuel / HighSchoolDXD

[[caption-width-right:350:[[SuperpoweredEvilSide Exhibit B]] [[BewareTheSillyOnes of a goofy pervy high school student.]]]]

[[caption-width-right:350:[[BewareTheSillyOnes Exhibit B of a goofy pervy high school student.]]]]

** One of the worst was his Juggernaut Drive transformation. Issei goes into an [[SuperpoweredEvilSide insane berserker state]], during which he ''[[IAmAHumanitarian chews off Shalba's arms.]]'' He also grows a multitude of limbs [[BodyHorror from all over his body.]] And the real kicker? Ddraig [[KnowWhenToFoldEm has to warn Rias and the others to run away]], because Issei would have killed them as well if they hadn't. The only reason this isn't High Octane is the way he was brought out of it. And this was only from Kiba and the rest's point of view. From Issei's point of view himself? ''[[UpToEleven It's a lot worse]]''. Shalba's [[OhCrap look of utter terror as Issei attacks him]] is suitably unsettling.

* Shalba tries to kill Asia by sending her to the Dimensional Gap without hesitation. That action is the trigger]] for the above mentioned Issei's [[SuperpoweredEvilSide Juggernaut Drive]].

* Shalba tries to kill Asia by sending her to the Dimensional Gap without hesitation. [[MoralEventHorizon That action]] [[TraumaticSuperpowerAwakening is the trigger]] [[FromBadToWorse for the above mentioned]] Issei's [[SuperpoweredEvilSide Juggernaut Drive]].

* Shalba tries to kill Asia by sending her to the Dimensional Gap without hesitation.

* Gasper losing it when told that Issei's dead and calmly killing Marius Tepes will also catch people off-guard. The image even serves as the page image for the Anime and Manga subpage of BewaretheNiceOnes

* Gasper losing it when told that Issei's dead and calmly killing Marius Tepes will also catch people off-guard.

* Picturing the demise of the other nuns at Diodora's hands. They met Diodora at his most affable. But he would soon brand them [[TheHeretic heretics]], thereby [[TheExile exiling them from the church]], and then they would rape and enslave them, as no one else would have anything to do with them. They would know that this devil is not just crazy, but a murderer. Pious or not, it's too late to escape.

* Issei's DeathByOriginStory after his date with Raynare, while doubling as a TearJerker, can catch people off-guard. He gets ImpaledWithExtremePrejudice and is left to die, bleeding from the hole in his stomach. Also, seeing [[EtTuBrute his betrayed]] and [[OhCrap shocked expression]] when this is happening is suitably unsettling.

** The second time he almost pulled off Juggernaut Drive was when he got himself knocked unconscious by Sairaorg in their match. He then wakes up to a white world with the past Boosted Gear users, surrounded by dark aura. One by one, [[MadnessMantra they tell him to pull off Juggernaut Drive]] to the point ''he joins with them.''
** The anime's initial version [[note]]before it was rebooted into the much-closer version hinted above[[/note]] takes this UpToEleven and can catch viewers completely off-guard. ''Issei's body grows draconic, slowly and painfully, while the form speaks in a voice [[VoiceOfTheLegion somewhere between his and Ddraig's]], voices of past users whispering creepily all throughout''. The resulting rampage is punctured by repeated cries of pain, mainly draconic but sometimes with ''Issei's screams overlaying it''. Plus, Issei's Juggernaut Drive has the powers of Vali's ''[[{{Nerf}} Divine Dividing]]'' [[{{CallBack}} (stolen in their previous fight)]], and is able to NoSell Gasper's ''[[TimeStandsStill Forbidden Balor View]].'' This is an R15+ series, after all.

* Evil dragons in general can catch anyone off-guard, even those with dracophobia (fear of dragons). Considered by everyone as the most troublesome existences ever because they just love to destroy ForTheEvulz. Guess they got some lessons from [[Manga/FairyTail Acnologia]] and [[VideoGame/{{Warcraft}} Nefarian]].

[[caption-width-right:350:[[BewareTheSillyOnes Exhibit B of a pervy high school student.]]]]

[[caption-width-right:350:[[BewareTheSillyOnes Exhibit B of a perverted high school student.]]]]

* Issei may be a silly fellow half the time and is unquestionably the main protagonist, but [[UnstoppableRage once he's sufficiently angered]], may God have mercy on your soul. Case in point:
** One of the worst was Juggernaut Drive. Issei goes into an [[SuperpoweredEvilSide insane berserker state]], during which he ''[[IAmAHumanitarian chews off Shalba's arms.]]'' He also grows a multitude of limbs [[BodyHorror from all over his body.]] And the real kicker? Ddraig [[KnowWhenToFoldEm has to warn Rias and the others to run away]], because Issei would have killed them as well if they hadn't. The only reason this isn't High Octane is the way he was brought out of it. And this was only from Kiba and the rest's point of view. From Issei's point of view himself? ''[[UpToEleven It's a lot worse]]''. Even though he is defeated, Shalba's [[OhCrap look of utter terror as Issei attacks him is suitably unsettling]].

** The anime's initial version [[note]]before it was rebooted into the much-closer version hinted above[[/note]] takes this UpToEleven and can catch viewers completely off-guard. ''Issei's body grows draconic, slowly and painfully, while the form speaks in a voice [[UncannyValley somewhere between his and Ddraig's]], voices of past users whispering creepily all throughout''. The resulting rampage is punctured by repeated cries of pain, mainly draconic but sometimes with ''Issei's screams overlaying it''. Plus, Issei's Juggernaut Drive has the powers of Vali's ''[[{{Nerf}} Divine Dividing]]'' [[{{CallBack}} (stolen in their previous fight)]], and is able to NoSell Gasper's ''[[TimeStandsStill Forbidden Balor View]].'' This is an R15+ series, after all.

* Xenovia takes the chance to [[ShootTheDog perform an exorcism on both Asia and Kiba]], making it a point that the Church opposes Devils. Issei's ''very'' understandably opposed to this.

* Rizevim Livan Lucifer's demise, while [[KarmicDeath karmic at best]], caught readers off-guard. He might be an abusive grandfather and a malicious devil, but being curb-stomped by Issei and Vali and then EatenAlive by Fafnir [[CruelAndUnusualDeath isn't the best way to go]]. Still, the [[OhCrap look on his face]] is suitably unsettling.

* Picturing the demise of the other nuns at Diodora's hands. They met Diodora at his most affable. But he would soon brand them [[TheHeretic heretics]], thereby [[TheExile exiling them from the church]], and then they would rape and enslave them, as no one else would have anything to do with them. They would know that this devil is not just crazy, but a murderer. And it's too late to escape...
* Xenovia takes the chance to [[ShootTheDog perform an exorcism on both Asia and Kiba]], making it a point that the Church opposes Devils.

** The anime's version takes this UpToEleven and can catch viewers completely off-guard. ''Issei's body grows draconic, slowly and painfully, while the form speaks in a voice [[UncannyValley somewhere between human and dragon]], voices of past users whispering creepily all throughout''. The resulting rampage is punctured by repeated cries of pain, mainly draconic but sometimes with ''Issei's screams overlaying it''. Plus, Issei's Juggernaut Drive has the powers of Vali's ''[[{{Nerf}} Divine Dividing]]'' [[{{CallBack}} (stolen in their previous fight)]], and is able to NoSell Gasper's ''[[TimeStandsStill Forbidden Balor View]].'' This is an R15+ series, after all.

* Issei may be a silly fellow half the time and is unquestionably the main protagonist, but even he can be pretty horrifying [[YouWouldntLikeMeWhenImAngry when he gets angry]]. Case in point:

* Shuri Himejima's death at the hands of ''her own relatives'', given their resentment of Fallen Angels. To make matters even worse, her daughter Akeno was ForcedToWatch her die. It foreshadows that Akeno's relatives were ''not'' about to let her escape alive, at least until she met Rias.

* Xenovia takes the chance to [[KickTheDog perform an exorcism on both Asia and Kiba]], making it a point that the Church opposes Devils.

-->''I, who shall awaken; I am the Heavenly Dragon who stole the principle of domination from God; I mock the infinite, and fret over the dream; I shall become the Red Dragon of Domination; I shall drown you in the depths of crimson purgatory. Juggernaut Drive!''

* Xenovia takes the chance to [[KickTheDog perform an exorcism on Asia and Kiba]], making it a point that the Church opposes Devils.

* Rizevim Livan Lucifer's demise. He might be an abusive grandfather and a malicious devil, but being curb-stomped and then EatenAlive isn't the best way to go. The [[OhCrap look on his face]] is suitably unsettling.

** The anime's version takes this UpToEleven and can catch viewers completely off-guard. ''Issei's body grows draconic, slowly and painfully, while the form speaks in a voice [[UncannyValley somewhere between human and dragon]], voices of past users whispering creepily all throughout''. The resulting rampage is punctured by repeated cries of pain, mainly draconic but sometimes with ''Issei's screams overlaying it''. Plus, Issei's Juggernaut Drive has the powers of Vali's ''[[{{Nerf}} Divine Dividing]]'' [[{{CallBack}} (stolen in their previous fight)]], and is able to NoSell Gasper's ''[[TimeStandsStill Forbidden Balor View]].'' ''Yikes''!

* Hades is essentially a skeleton with glowing eyes and wearing a uniform used by priests. His appearances can catch people off-guard.

* The scene where Yasaka goes berserk after the Hero Faction forces her to transform into her Nine-Tailed Fox form.
* Issei became ''this close'' to dying permanently at the hands of Shalba.

* Issei's DeathByOriginStory was bad enough, but later on, he desperately turns to run from Dohnaseek, get stabbed from behind, and fall to the ground bleeding out before [[BigDamnHeroes Rias and (in the anime) her allies rescues him]]. Someone's having a bad day.

* Issei's DeathByOriginStory was bad enough, but later, he desperately turns to run from Dohnaseek, get stabbed from behind, and fall to the ground bleeding out before [[BigDamnHeroes Rias and (in the anime) her allies rescues him]]. Someone's having a bad day.

* Shuri Himejima's death at the hands of ''her own relatives'', given their resentment of Fallen Angels. To make matters even worse, her daughter Akeno was ForcedToWatch her die.

* The thought of the other nuns meeting their demise at Diodora's hands. They met Diodora at his most affable. But he would brand them [[TheHeretic heretics]], thereby [[TheExile exiling them from the church]], and then they would rape and enslave them, as no one else would have anything to do with them. They would know that this devil is not just crazy, but a murderer. It's already too late to escape and nobody is coming to save you.
* Gasper's face when he snapped when told that Issei's dead.

* Gasper does it again in Volume 16 when he calmly ''destroys Marius Tepes''.

* Rizevim Livan Lucifer's demise. He might be an abusive grandfather and a malicious devil, but being EatenAlive after being curb-stomped isn't the best way to go. The [[OhCrap look on his face]] is suitably unsettling.