YMMV: High School DD

  • Anti-Climax Boss:
    • Even after being turned into a chimera, Kiba one shots Freed like nothing.
    • Kokabiel, the Big Bad of Volume 3, could be considered this as well due to the sudden curb-stomping he received from Vali as a means to hype up the latter's power.
    • Leonardo of the Hero Faction. He is established to have control of one of the most overpowered Longinus' known to exist...and yet, he suddenly loses off-screen, and ends up randomly becoming Shalba Beelzebub's brainwashed henchman.
  • Ass Pull:
    • The Breast God appearing to help defeat Loki. To be fair though, it's even treated as one in-universe.
    • The relationship trauma Raynare caused to Issei is a major theme that Issei has to overcome in volume 10. However, despite being one of the most loved volumes amongst fans, it can come off feeling suddenly out-of-nowhere as there was absolutely no Foreshadowing in the prior volumes to show that Issei had been suffering in this regard. The anime actually sets this up better by showing glimpses of the trauma at the start of the third season, which was only just starting up the volume 5 content at that point.
    • Plus, as much as many people liked that Kiba achieved Balance Breaker, the way he did so fits the description: he achieved it through releasing the souls inside the crystal that his friends souls were trapped in, which allowed him a resolution of heart. Thus, he achieves Balance Breaker. Though, even though Balance Breaker is stated in the first two volumes, this came completely out of left field. As well, Kiba achieved Blade Blacksmith's Balance Breaker even though it was never hinted until Volume 10 he had another Sacred Gear. As far as this troper knows, it isn't possible to actually DEVELOP a second Sacred Gear you aren't born with.
  • Big Lipped Alligator Moment: Fafnir's cooking show in Volume 17 during what is supposed to be an intense battle between Issei and company against the forces of Qlippoth.
  • Base Breaker: In spite of being the most popular villain in the series, to say that Raynare is a divisive character is an understatement: one half says that Raynare is nothing more than a smug, coward villain who deserved her comeuppance by the hands of Rias, especially for killing Issei with no good reason. The other half, instead, says that the psychological damage Raynare inflicted to Issei made the series a lot more interesting, and also that she could have at least had some of her backstory expanded. And then there are those who whitewash her like she's Draco Malfoy.
  • Broken Base:
    • If there's one thing fans really can't agree on, it's the Gremory-Sitri Rating Game. Was it thoroughly justified that the Gremory team had a limiter working against them, thus giving them a real wake up call that just powering through everything isn't really all there is to it, or was it unfair to the Gremory team that they had a limiter on them when they couldn't show off what they could do now after their training? Or you're probably on the third faction and thought that the limiter made the Sitri team look weak, never mind Souna being able to adapt things on the fly because only the protagonist has the right to be a Combat Pragmatist right? Part of the problem really is because Issei, the protagonist himself, gets taken out halfway through the game because of said limiter imposed when most series would have the protagonist be present all the way to the end.
    • Who is better? Rias or Akeno? Although almost all fans like both of them at the same time, let's just leave it at that. Some Take a Third Option and instead choose Asia... or Koneko which is, err, complicated.
    • The faster pacing of the 3rd anime season has not sat well with some fansnote . Others are just happy to see the anime back in action.
    • The ever present Dub vs Sub debate. Complicating the issue is that the dub is censored note , but is full of Woolseyism.
  • Crazy Awesome:
    • Seriously, if he wasn't the protagonist, Issei would be dead by now with all the crazy stuff he can pull off. To wit, he has: done a rescue mission to Asia by punching out a Fallen Angel so hard she bursts through the wall (out the window in the anime), barged in an engagement party full of devils to take back Rias, invented Dress Break and Bilingual out of pure lust, defeats Riser, an immortal phoenix, not with the use of his newly-found dragon powers, but by using a holy cross and holy water which he can't even use because he's a devil, but is capable to do so because his arm is a dragon's, powers up with lust and by using Rias' breasts, accidentally summons the Breast God (well Breast Fairy but still definitely counts), is capable of breathing fire to a shadow-using opponent, and was able to make the past users of Boosted Gear come back to the light and make them stop relying on Juggernaut Drive with breasts. If there's one thing Rias recruited to her group, it's the fact that she recruited the craziest character of the series. No one out-crazies Issei at all in this series. And yet somehow, he's also the Only Sane Man in the group (when he's not doing his lecherous ways).
    • Rias may count to a lesser degree too. Who's crazy enough to be willing to bare her breasts open just to let Issei get a power up in public viewing!? Also renovate Issei's house from a simple house into a six-story mansion with a three-story basement and an elevator overnight!?
    • Azazel too can count as one. The craziest idea he pulled off is that to capture the Issei clones he accidentally unleashed, he suggests the idea of using fishing on them. With porn as the bait.
      • Forget Azazel himself, the entire Grigori institute counts.
  • Die for Our Ship:
    • Despite being a harem and everything, people seem to not like Asia as much as the rest of the characters because according to the fans, she's too clingy to Issei to share with everybody else.
    • Koneko isn't safe from this either, possibly due to her much more prudish behavior towards Issei than the rest of the girls. However, her character arc in Volume 5, which caused her to lighten up to Issei more, mitigated this a bit.
  • Ear Worm: The ED from the animes first season. It will get stuck in your head.
  • Ensemble Darkhorse :
    • Mil-tan has appeared in only a few scenes, and is one of the most discussed characters in the series. Take note, he's a Creepy Crossdresser.
    • Ophis is practically well-loved by the audience too.
    • Kuroka is shown to enjoy a good degree of popularity in the fandom, and is possibly the only girl in the harem to rival Rias and Akeno in popularity. All in all, she definitely does eclipse her younger sister Koneko in popularity. Perhaps coincidentally, her breast size is also third after Akeno and Rias among recorded characters.
  • Escapist Character: Three guesses, and the first two don't count.
  • Fan-Preferred Couple: Issei/Akeno seems to edge out the Official Couple Issei/Rias in terms of popularity.
    • Some also prefer Issei/Kiba. And if they don't like Ho Yay or want a variety, there's also Issei/Yumi.
  • Friendly Fandoms: There are rather strong bonds between the DxD fandom and the Date A Live fandom. It helps that both series are from the same publisher.
    • Also, with To Love-Ru, due to the overall similarity between the two shows.
      • Both series also have a penchant for extremely attractive women.
    • Oh, the DxD fandom also has close ties with the Senran Kagura fandom. Expectable, given that the girls in both series share... Nice assets.
  • "Funny Aneurysm" Moment : An in-universe example. One of the short stories of the series was about the Issei clones that Azazel had played a prank on Issei. It was mostly funny until the part where they had to use the memory-erasing machine Azazel had invented (at best, they could only erase the memory of the clones running around but didn't erase the fact that an Issei clone did it, leaving the victims thinking the real Issei had done it to them because it would damage their brain memory). At that point in time, it was hilarious, albeit a bit unfair to Issei who didn't really deserve all that. Fast forward to volume fourteen, and that memory-erasing machine incident suddenly doesn't become funny anymore thanks to the student council group using it to wipe off the memories of the students were the victim of a rouge wizard terrorist attack at the school, which leaves students traumatized of something but not what. This left a bitter taste to the student council and the protagonists.
  • Hilarious in Hindsight:
    • Vali notes back in the fourth volume that the current red-white dragon rivalry was a bit unfair because Vali's the descendant of the old Lucifer and Issei's the son of a common Muggle. Vali wishes that Issei's parents were a bit special so they can have a more interesting match. Now that Great Red and Ophis are both Issei's parents by proxy by creating a body for him from Great Red's flesh and Ophis' powers, let's just say Vali's wish came true. Though seeing as Vali's a Blood Knight, he's probably pleased with the development.
    • The volume one afterword has the supposedly final battle will be between a guy who can breath flames and Issei supposedly shooting out a blaster. Now read how the final clash between Issei and Jabberwocky went in volume 12.
    • For those who have played The Last Remnant, whenever Kiba calls Irina Shidou, you might be reminded of how Rush always calls Irina.
  • Ho Yay: Believe it or not, now has its own page!
  • HSQ: Among the highest in the history of light novels.
  • Launcher of a Thousand Ships: Issei, though this isn't really surprising.
  • Marty Stu:
    • Vali is close to being considered one as practically his entire character is centered around seeking out foes stronger than him just because he's bored. To be fair though, the story happens to have A LOT of battle seeking maniacs that it makes having Vali all the more satisfying to have around. And he does finally gain a more humane reason to get stronger after his hated grandfather enters the picture in volume 16.
    • Issei can also be considered one, though Character Development has helped him in that regard.
  • Memetic Badass:
    • Issei motherfucking Hyodo. What did you expect from somebody who has just as many Badass tropes as the freaking Dragonborn?
    • Also, GARspernote , Azazelnote , and Sirzechsnote  are very prominent in the Imageboards.
  • Memetic Molester: Good lord, Riser. Freed has it even worse.
  • Memetic Mutation:
    • Somewhat a meta example: if any volume is delayed for its release, expect people to post about Ishibumi and trains. Fandom just went with it.note 
    • Doctor Crimson and Canary Maid which is especially prevalent at Imageboards.note 
    • The first ending credits of the anime. Probably has to do with Koneko-chan shaking that.
  • Memetic Sex God:
    • For the male characters, it's Isseinote , Azazel, and with just one pic from the anime, Sirzechs and Lord Gremory.
    • For the ladies, it's very usually Rias and Akeno.note  Xenovia, Grayfia and Kuroka get their fair share, too, though not to the inconceivable extent of the former two.
  • Moe: Lots of the girls in the series. Asia and Koneko are perhaps the most obvious cases.
  • Rewatch Bonus: Oh so many. Even the author recommended to re-read the entire series before the fourth arc started.
  • Ron the Death Eater: For whatever bizarre reason, Issei is made to be a much bigger loser then he really was at the beginning of the story to make whatever OC insert fanfic writers make to make him look better then Issei, usually accompanied with stealing Issei's harem members if Issei is still around in the story if not outright replaced entirely.
  • One-Scene Wonder: The Breast God when she appeared before Issei to help him defeat the evil God, Loki.
  • OT 3: Issei/Rias/Akeno is probably the most popular out of all of the show's OT3s.
  • Periphery Demographic: To the surprise of Ishibumi, there are a lot of female fans of the series despite the numerous amounts of Fanservice. Heck, one bookstore had the series volumes in the women section.
  • Signature Scene:
    • Issei's "death" at the hands of Raynare which set the tone for the story to be much more than a basic Harem series.
    • Issei waking up in his bed next to a naked Rias.
  • They Changed It, Now It Sucks: Those that read the light novels seem to be having this reaction to the third season of the anime. The order of events has been switched around, details like the charge-up period and time limit of Issei's balance breaker when he can use it at will have been glossed over, and content that only occurs in the anime seem to be the three big offenders for them. While some seem agree that things like the fine details of Issei's balance breaker probably need to be swept under the rug for the sake of the anime's pacing, the anime only content has them up the wall since the light novels have more than enough story in them to last another three to five seasons easily. They basically decry the anime only content as excuses for more fanservice in a series already overflowing to the brim with it.
  • They Wasted a Perfectly Good Plot: The vampire civil war that takes place in volumes 14 and 16. The only reasons why the vampires got involved in the plot was just so the writer could introduce Rizevim Lucifer, and to give a bit of much needed Character Development for Gasper. Some fans thought that the vampire civil war needed more time to take in and develop than what was given.
  • Tough Act to Follow:
    • Not the show itself, but the show-stopping pole-dance ending-song sequence Study X Study from Season 1, with its energetic and upbeat song and astoundingly fluid and well-designed animation (all animated by one man, mind you) set such a high standard (and became a Cult-Favourite amongst fans) that the second/third ending sequence from Season 2 simply couldn't top it, and hence the crew didn't even try.
    • The vampire civil war gets this reaction for taking place just moments after the glorious final battle against the Khaos Brigade's Hero Faction; helped by the immense build-up the Hero Faction had until that point. Not only were the vampires incredibly underdeveloped in comparison to the Heroes (Cao Cao in particular), the vampire war, itself, comes off as an irrelevant side-story just to have a setting to introduce the new leaders of the Khaos Brigade.
  • The Scrappy: Diodora is despised by the fandom for causing Asia's troubled life before meeting Issei.
  • What an Idiot: Most people seeing Issei not being able to realize the girls' feelings towards him, though it's justified given the psychological damage he received from his experience with Raynare. The crown goes, though, to the Two Heavenly Dragons (Ddraig and Albion), who decided during the great war to fight God, Satan and the leader of the Fallen Angels. They were quickly dismembered and the Sacred Gears - Boosted Gear and Divine Dividing - are what's left of them stored.
  • Woolseyism: For their dub, Funimation has noticeably added a fair dose of sexual references and cranked up the eroticism in the dialogue, most notably with Akeno. But given the show's nature, it works brilliantly. Most of the Funny Moments page is done using dub vs sub, as a matter of fact.