* {{Adorkable}}: When Eureka's not being serious, she tends to come off as this. Of particular note are her reactions to someone mentioning the DefaceOfTheMoon in her time or Renton.
* AlasPoorScrappy: Even some of Naru's detractors feel that she did not deserve the ending she was left with by the time the series was over. [[spoiler:This is mended in ONE MORE TIME, which leaves Naru on a happier note in the new reality.]]
* AssPull: [[spoiler: [[GiantSpaceFleaFromNowhere Where DID Kanon come from, anyway?]]]]
* SugarWiki/AwesomeMusic: Similar to the first series, AO has ''amazing'' background music.
** The first opening, [[http://soundcloud.com/dadupm/hemenway-escape Escape by Hemenway]], and ending, [[http://vimeo.com/41229297 stand by me by Stereopony]], are also pretty good.
** The second opening, [[https://www.youtube.com/watch?v=-004jvKhKA8 BravBlue by FLOW]], which deliberately sounds like the first opening to ''Eureka Seven'', "Days".
** The insert song, [[http://www.dailymotion.com/video/xv8t8n_sign_music Parallel Sign]].
* BrokenBase:
** Many fans were disappointed at how the finale turned out to essentially be a NoEnding. Others weren't surprised given Bones' track record for sequels with [[Anime/DarkerThanBlack disappointing endings]]. Fortunately, the outcry was so severe that Bones reneged and gave the show an additional episode to genuinely wrap up the story, with a title lampshading that it was their own attempt at a do-over.
** The way it contradicted several themes from the first series irked many.
* ContestedSequel: Opinions are divided; for many it has full-blown {{Sequelitis}}. The ending has caused cries of FanonDiscontinuity.
* EnsembleDarkhorse:
** Noah, the cute TeamPet, is seen as a bro to most of the community, especially due to his never changing expression and his actions, like [[spoiler: freeing Ao from capture in Episode 3]]. Most fans have compared him to Gulliver from the first series.
** The random Okinawan man who takes Ao around in Episode 4 is also seen as a true bro.
* FanNickname:
** Pied Piper's leader, Ivica, is now being called Creator/StanLee due to his similarities to the famous comic book creator.
** Naru is often called [[{{Netorare}} NTRu]] due to her [[spoiler:partnering up with Truth and becoming one of the antagonists.]]
** The Quartz Gun is usually called the [[CosmicRetcon Retcannon]].
** Ao is sometimes called [[Theatre/OedipusTheKing Aodipus]].
* FanPreferredCouple: As Fleur got more CharacterDevelopment, and Naru became TheScrappy, fans started migrating more toward a Fleur x Ao pairing.
* {{Fanon}}: Many fans have come up with epilogues (such as the "delusions" threads in /a/ of 4chan) that diverge from the main plot at various points, including one where Ao arrives in a future where everybody still remembers him, EverybodyLives (including [[spoiler:Ao's sister]]), and Ao [[FanPreferredCouple hooks up with Fleur]]. This became HilariousInHindsight when ONE MORE TIME was made.
* GeniusBonus: The lightning-generating Secret in Episode 8 was last spotted in Philadelphia in 1752, the same year Franklin conducted his famous "catch lightning with a kite" test.
* GrowingTheBeard: Episode 12 seemed to be this while the series was airing; it looked like the show was taking a bold new direction that would bring it closer to the original series. The mixed reaction to many of the episodes that followed it indicate that whatever beard it had was quickly shaved off.
* HarsherInHindsight: The revelation that Eureka can bear human children was considered by many to be one of the more heartwarming moments of the original series and a confirmation that humans can co-exist with Coralians. And then the final episode aired, which revealed that [[spoiler:the high amount of trapar in the original series' universe is fatal to Human-Coralian hybrids. This made the scene showing Renton and Eureka burying their infant daughter unbelievably worse.]]
* HilariousInHindsight: Creator/MicahSolusod, who many people have noted sounds like Creator/JohnnyYongBosch (the voice of [[Anime/EurekaSeven Renton]]), getting cast as Ao, Renton's son.
** Also, this wouldn't be [[Series/KamenRiderGhost the last time]] [[spoiler: something (or someone) named Kanon would cause problems for viewers]].
* HoYay: Fleur and Elena, in spades.
* MemeticMutation: [[StrawmanHasAPoint Dewey was right.]][[labelnote:source]]Due to several revelations and themes which only seem to reaffirm the antagonist from the original series' belief that Humanity and the scub coral really ''cannot'' co-exist.[[/labelnote]]
** A picture of Eureka and Renton crying next to an Easter Island head ([[spoiler:due to hatred of how Ao's sister died]]) has also proven popular.
* MyRealDaddy: Fans note that this work wasn't headed by Dai Sato, the brainchild of the original series, when dismissing ''AO''.
* {{Narm}}: Happens more frequently as the series progressed. Few people agree just how much of it there was, but many agree that not only is Truth the biggest contributor to it, but he IS the {{Narm}}.
* ParanoiaFuel: As was shown with Team Goldilocks, the Quartz Gun has the power to change history, but nobody other than Ao would ever be aware of the effects, meaning one of your closest friends may suddenly stop existing and you would never notice or vice versa.
* QuestionableCasting: Casting [[Creator/KeijiFujiwara Holland]] as Renton is getting this reaction.
** For some people, this counts as HilariousInHindsight.
* RescuedFromTheScrappyHeap: The manga adaptation managed to do this for Naru [[spoiler:by having her make a true HeelFaceTurn against Truth]].
* TheScrappy:
** Truth is almost universally disliked among fans, mainly due to being introduced completely out of the blue, having overpowered abilities including energy projection, flight, and shapeshifting in a series that has thus far avoided having such characters, messing with Ao's head, taking and manipulating Naru, and randomly slaughtering people.
** Naru fell into this category especially after her FaceHeelTurn when she joins Truth and becomes one of his collaborators. [[spoiler:TheReveal in episode 22 that she was only trying to help Ao borders on AuthorsSavingThrow in this regard, but this is turned on it's head the very next episode when she still ends up choosing Truth's side over Ao.]]
* StrawmanHasAPoint: The series proved that Dewey Novak, for all of his unjustified actions and beliefs, was at least right about humans and Scub Coral being incapable of coexisting, seeing as how it was the Scub Corals' fault humanity was getting screwed over.
* TakeThatScrappy:
** Episode 23 seems solely dedicated to this. [[spoiler:Naru gets her comeuppance for all the crap she's pulled. Truth, meanwhile, erases himself from existence. Fortunately for them and unfortunately for their detractors, they both get better. Yes, even the guy who ''erased himself from existence.'']]
** The manga makes Truth's [[spoiler:death]] even more of a TakeThatScrappy moment by [[spoiler:having ''Ao'' erase him from existence, rather than Truth doing it to himself, which makes it more of a true defeat]].
* TheyWastedAPerfectlyGoodPlot: Many potentially good plot points such as [[spoiler:whether Elena was from the original E7 universe or not, the presence of [=theEND=], the identity and fate of Ao's sister, and many more]] were either ignored or turned out to be {{Red Herring}}s. In fact, you could say that they Wasted a Perfectly Good Sequel.
** TheyWastedAPerfectlyGoodCharacter: [[spoiler: Archetype Truth]] is a better character than his pre-Retcon counterpart. He appears in exactly one episode.
*** And in vehicular form with the ''Gekko'', [[spoiler:which appears in episode 13, and sunk in episode 14]].
*** Naru. Not only is she not as prominent a character as you'd think she'd be (as she was positioned as the main heroine alongside Ao at the start), but everything about her design suggests that, just as Ao is the son of Renton Thurston and Eureka, Naru must be the daughter of Dominic Sorel and Anemone. She isn't - her parents are random characters with no pre-established connection to the series and other characters. [[spoiler:Her becoming an antagonist would have been a lot more fitting if she had been Dominic and Anemone's offspring, as her and Ao coming into conflict with each other would mirror the conflict that their parents had when they were young.]]
* UnintentionallyUnsympathetic:
** Naru genuinely believes Truth is a kind person for not killing Ao, despite the fact that Truth had callously killed ''dozens'' of innocent people beforehand. True, she didn't witness most of it, except for the one time where Truth demolishes a plant coral facility right in front of her ''with the workers still inside it''.
** Fleur gets a major case of this in her backstory. [[spoiler:She resents her father over the fact that he, when facing a SadisticChoice, opted to let Fleur's mother die so that her organs could be used to save Fleur's life, so Fleur blames her father for the fact that her mother isn't alive today...even though this also means that he's the reason Fleur ''is'' alive today to even gripe about this at all. Being given the gift of a second chance at life and using it to act out on resentment to the person who provided it to her in the first place reeks of UngratefulBitch on Fleur's part.]] The Manga has [[spoiler:Fleur's reason for resenting her father is altered to him being [[ParentalNeglect a neglectful parent]] who makes himself come across as colder than he truly is.]]
** Elena and Ao too, due to similarly unwarranted, ungrateful attitudes toward Eureka and Renton respectively. In the manga Elena has no resentment toward Eureka.]
* ViewerGenderConfusion: The Funimation subs say that Noah is a girl.

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