* ActorAllusion:
** Ayumi's position in the [=2B Pencils=] is that of the second guitarist. [[Creator/AyanaTaketatsu Her voice actress's]] StarMakingRole was Azusa Nakano from ''Main/KOn'', also the second guitarist of her band Hokago Tea Time (of which the [=2B Pencils=] were [[{{Expy}}probably based on]]).
* FanNickname:
** Yuima - Yui [[spoiler:in Keima's body]] during the FreakyFridayFlip arc.
** Some fans have also made a pun on Haqua's name as "du Lot of Deathflags", due to the serious mistakes she has made throughout the story.
** Then there's [[spoiler:"[[HotTeacher Nikai]][[TheChooserOfTheOne dokurou]]"]] as prominently used from FLAG 250 onward. The spoiler is there for everyone's protection.
* HeyItsThatVoice:
** [[Creator/HiroShimono Keima]] may have previously fangasmed [[MobileSuitGundamUnicorn over mobile suits...]] Or maybe have been the subject of [[BakaToTestToShoukanjuu various comic abuse]] outside of his galge obsession...
** There's just no way that [[Creator/AyanaTaketatsu my athletic classmate/first capture target]] [[LightNovel/OreNoImoutoGaKonnaNiKawaiiWakeGaNai can be this cute!]] ([[Manga/KOn Nyaa~n!]])
** It is quite surprising that some VA's here (both Japanese and English VA's at that) have also voiced characters from ''LightNovel/InfiniteStratos'':
*** [[Creator/LuciChristian Elsea]] and [[Creator/MegumiToyoguchi Nora]] become Ichika's elder sister / homeroom teacher / dorm supervisor.
*** [[Creator/HilaryHaag Mio and Shiori's English VA]] voiced Rin.
*** [[Creator/BrittneyKarbowski Kanon's VA]] voiced Cecilia.
*** [[Creator/KanaHanazawa Shiori's Seiyuu]] voiced a CharClone.
*** [[CynthiaMartinez Jun]] was previously Chifuyu's assistant homeroom teacher, aside from being an ex-cadet representative.
*** [[Creator/ChrisAyres Kodama]] becomes Ran's elder brother.
** In addition, it seems [[Creator/KanaAsumi Chihiro]] previously worked for [[Creator/AkiToyosaki Jun]] [[Manga/MaidSama at the Maid Latte Cafe.]] Before that, she was a GenkiGirl with CuteLittleFangs, who was a part of one of the most {{Badass Crew}}s [[TengenToppaGurrenLagann to ever exist in Anime.]]
*** She also was an [[AnimeChineseGirl Anime Chinese]] {{Action Girl}} from ''[[Manga/MahouSenseiNegima another]]'' {{Badass Crew}}.
** Anyways, was [[Creator/SaoriHayami Haqua]] an [[Anime/MobileSuitGundamAGE X-Rounder]] before?
** [[Creator/AmiKoshimizu Kusonoki]] was an Ace Pilot [[Anime/CodeGeass in a Knightmare Frame]].
** [[Creator/AtsukoTanaka Nikaido-sensei]] was [[GhostInTheShell a badass female cyborg cop.]]
** "Yuki-Onna No Yamato / Snow Lady of the Mountain", you say? I'd say [[Creator/RyokaYuzuki Mari]] is "[[MeltyBlood The Princess of The True Ancestors]]"... or maybe [[CarnivalPhantasm Phantasmoon...]]
** [[Creator/AoiYuuki Mio]] was previously a [[Anime/PuellaMagiMadokaMagica magical girl with pink hair]], who then retired to become an [[Anime/GundamBuildFighters idol singer-slash-build fighter]].
** By the way, [[AiNonaka Konoka]] [[MahouSenseiNegima Konoe]] braided her hair and gained a pair of glasses, as she became head of the Library Committee, [[MonicaRial even in the English Dub.]]
** Seems [[TakumaTerashima Ryou]]'s DumbBlonde behavior is just a front. He could be an AxCrazy [[MobileSuitGundamAge Jerkass Vagan Pilot.]]
*** Still, don't expect him to shout '''[[VideoGame/SuperRobotWarsOriginalGeneration OVERKAISEERRR! SWOOOOOOOORD!!!!!]]''' that often...
** And surprisingly, [[Creator/SakuraTange Youkkun]] was [[Manga/CardcaptorSakura a magical girl in search of cards...]]
** [[Creator/RyuseiNakao Kodama]] is secretly [[{{Manga/Bleach}} a mad scientist shinigami.]]
** [[Creator/TomokazuSeki The pitcher from Season 2 Episode 3]] is so HotBlooded, that it is rumored that [[FacePalmOfDoom his hand]] [[Anime/MobileFighterGGundam glows with an awesome]] '''[[LargeHam POWERRRRR!!!]]'''
** If that was not enough, [[Creator/TetsuInada one of the wrestlers]] from the Nagase Arc has [[VideoGame/SuperRobotWarsOriginalGeneration an entrance theme that ca-]]'''''[[http://uk.youtube.com/watch?v=pYsz3ytMQ3Y TROMBE OVERRIDE!]]'''''
*** AND, he tends to [[Main/{{Kiai}} scream]] '''''[[TurnAGundam UNIVAAAAAAAASE!!!]]''''' A lot!
** For dub fans, [[Creator/ChrisPatton Keima]] steps into the shoes of two VisualNovel protagonists... their anime adaptations, that is -- since he voices [[VisualNovel/EfAFairyTaleOfTheTwo Kyosuke]] and [[VisualNovel/{{Kanon}} Yuichi]].
*** Let's not forget that he used to be a [[LightNovel/FullMetalPanic stoic child soldier]] who had NoSocialSkills...
*** In addition, Elsie is [[VisualNovel/{{Clannad}} Nagisa]], and Kanon is [[Manga/SoulEater Black Star]]
** [[Creator/KaoriNazuka Tenri]] was [[CodeGeass a Britannian princess]] while Diana was [[{{Kampfer}} a student council president]] [[{{Troll}} who liked messing with people for fun.]]
** [[Creator/YukaIguchi Tsukiyo]] was previously a TokenMiniMoe [[BokuWaTomodachiGaSukunai Ten-year-old Nun.]] She was also [[Main/NotAMorningPerson quite lethargic]] back then, but that did not stop her from [[Anime/GirlsUndPanzer driving a Panzer IV tank like a badass.]]
** [[Creator/AyahiTakagaki Yui]] meanwhile, was a [[MobileSuitGundam00 a pink-haired Bridge Bunny]], [[FateZero a Filipina Brainy Brunette-turned-Vampire]], AND [[MobileSuitGundamAGE a seven-year-old Enfante Terrible.]]
** And it seems [[Creator/HarukaTomatsu Mileina]] [[MobileSuitGundam00 Vashti]] migrated to Maijima [[Film/Gundam00AWakeningOfTheTrailblazer after the ELS Conflict]] to work as a district chief with a box cutter.
* IKnewIt: [[spoiler: Ayumi being Mercury's host. For the GenreSavvy, the author pushing Chihiro only made it more likely.]]
** [[spoiler:ClassicalMythology combined with one of Apollo's comments about how she ended up in Kanon because she's the god of music. Of the candidates, who fits the God of Travel most?]]
** [[spoiler:Subverted in the case of Tsukiyo; while ClassicalMythology would have put Diana, goddess of hunting, poetry, and ''the moon'' in her, she instead got Vulcan since Diana was already introduced as the one inside Tenri.]]
* NoExportForYou: The light novels. The first one had two exclusive capture targets in Tooru Amami and Asami Yoshino, while the second had Shino Akuragawa and Aoba Fuse.
* PortmanteauSeriesNickname: ''Kaminomi''
* RelationshipVoiceActor:
** Did you know that the voices of [[Creator/HiroShimono Keima Katsuragi]] and [[Creator/AmiKoshimizu Kusonoki Kasuga]] are also the voices of two of the Sanbagarasu (Crow Trio) SiblingTeam, [[Creator/HiroShimono Kuromaru]] and [[Creator/AmiKoshimizu Sasami]] respectively, from ''Manga/NurarihyonNoMago''.
** The voices of Keima and [[Creator/KanaHanazawa Shiori Shiomiya]] also voice Jun Mikuriya and Zange[=/=]Hakua Suzushiro respectively from ''Manga/{{Kannagi}}''.
*** [[spoiler: A bit of HilariousInHindsight that Kana Hanazawa voiced girls that have goddesses in them.]]
*** [[Creator/HarukaTomatsu Lune's]] voice actress also played Nagi.
** The voices of [[Creator/KanaeIto Elsea]], [[Creator/KanaAsumi Chihiro Kosaka]], [[Creator/AkiToyosaki Jun Nagase]], and [[Creator/RyokaYuzuki Mari Katsuragi]] also voice [[Creator/KanaeIto Amu Hinamori and Dia]], [[Creator/KanaAsumi Ran]], [[Creator/AkiToyosaki Su]], [[Creator/RyokaYuzuki Temari, Nana, and Hotaru]] from ''Manga/ShugoChara''.
** The voices of [[Creator/SaoriHayami Haqua]], [[Creator/AyanaTaketatsu Ayumi Takahara]] and Chihiro also voice Yuno Arashiko, Mio Isurugi, and Shizuka Sado respectively from the ''LightNovel/{{MM}}'' anime.
** The voices of Elsea, Haqua, and Kusonoki also voice Mihoshi Akeno, Sayo Yarai, and Fumie Kotozuka respectively from ''Manga/SoraNoManimani''.
** The voices of Haqua and Jun also voice Ikaros and Chaos respectively from ''Manga/HeavensLostProperty''.
*** So, Saori Hayami has gone from voicing a {{kuudere}} busty Angeloid wielding a {{BFG}} to a {{tsundere}} [[ACupAngst size-conscious]] New Devil wielding a SinisterScythe.
** The voices of Keima and [[{{Kujira}} Dokurou Skull]] also voice Ikuto Tohoin and Koto (a.k.a. Obaba) respectively from ''Manga/NagasareteAirantou''.
** This series marked the return of the Creator/ChrisPatton[=/=]Creator/LuciChristian combo in the dub (playing Keima and Elsie respectively) after Chris had been away from voice acting for a few years.
** And now with the introduction of [[Creator/HarukaTomatsu Lune]] in Season 3, this trope now applies to her seiyuu, [[Creator/HiroShimono Keima's]] and [[Creator/MegumiToyoguchi Nora's]] regarding their previous roles in ''MobileSuitGundamUnicorn'', being the voices of [[{{Ojou}} Micott Barsch]], [[{{Otaku}} Takuya Irei]] and [[MissionControl Mihiro Oiwaken]], respectively.
** And since we're on the topic of ''Franchise/{{Gundam}}'', we have Elsea, Mari, Haqua, Shiori, Kusonoki, Yui and Ryou, appearing in ''MobileSuitGundamAGE'' as (in exact order) [[IllGirl Lu Anon]], [[DarkActionGirl Reina Spriggan]], [[MysteriousWaif Yurin L'Ciel]], [[BridgeBunny Romary Stone]], [[PluckyGirl Arisa Gunhale]], and ''BOTH generations'' of [[EnfanteTerrible Desil]] [[EvilRedhead Galette]].
** Meanwhile, [[Creator/AoiYuuki Mio's]] and [[Creator/SaoriHayami Haqua's]] respective seiyuus meet up again in ''Anime/GundamBuildFighters'', as [[IdolSinger Gunpla Idol Kirara]] and [[EmotionlessGirl Aila Jyrkiäinen]] respectively; the latter even brought some of Haqua's {{Tsundere}} tendencies.
* StarMakingRole: Newcomer Creator/NaoTouyama as [[IdolSinger Kanon]].
* TalkingToHimself:
** Parodied in Season 2, episode 12, for both the actor, Creator/HiroShimono, and in-story, as Keima contemplates what makes the ideal game, by way of epic [[BattleInTheCenterOfTheMind political debate and an intergalactic war]] between Keimanites.
** Played somewhat straight with the Jupiter Sisters. In the anime, they share the same voice as their hosts with added echoes for effect.
* TropeNamer:
** WildCardExcuse
* TheWikiRule: [[http://kaminomi.wikia.com Right here...]]
* WhatCouldHaveBeen: There was a one-shot before the series proper began with a number of differences, including no contract, no memory wipe, a seven day time limit on the catch, a more mature design for Elsie, Keima acting and looking more like your average {{nerd}} and less like a ManipulativeBastard and [[ArsonMurderAndJaywalking his last name being Imai]].
** Also, Keima's first capture was Mio, who had a more normal physique and no twintails, and was still living in luxury. The prototype also did not give captured girls EasyAmnesia, so she remained infatuated with Keima, much to his chagrin.
* XMeetsY: LightNovel/TheMelancholyOfHaruhiSuzumiya meets Film/GhostBusters.