* AccidentallyAccurate: Ichika in the novels always called the [[{{Moe}} cute]] {{Sleepyhead}} girl with the long sleeves "Nohohon-san", which roughly means "Ms. Whatever" since he didn't know her name. On her end, she thinks he's calling her a shortened version of her real name. When Ichika finally admits he doesn't actually know her name in Volume 5, she gets upset, though she gets over it fast. Her real name is Nohotoke Honne, which meant Ichika was getting it pretty close the whole time.
* BadExportForYou: The author had some fits with the publisher over allegedly unauthorized Chinese localization deal, causing the series to be put on hiatus for a few month.
* FanNickname:
** Honne Nohotoke gained the nickname "Pikachu-chan", due to her unusual beach costume in season 1 episode 9.
** Then there's "Neutron Star" for Ichika, due to his [[CluelessChickMagnet romance-related cluelessness]] which rivals even [[LightNovel/{{Kampfer}} Natsuru Senou]].
* [[HeyItsThatVoice Hey, It's That Voice!]]
** [[KoukiUchiyama Ven]][[VideoGame/KingdomHeartsBirthBySleep tus]] has been enlisted into an all girls school!
** [[Creator/YokoHikasa Mio]] [[Manga/KOn Akiyama]] has taken up Kendo and remembers Ven was her first childhood friend!
** [[Creator/{{Yukana}} Tessa]] [[LightNovel/FullMetalPanic Testarossa]] is an influential British aristocrat who hates weak men.
** [[Creator/AsamiShimoda Crim]][[VideoGame/CosmicBreak rose]] is Ven's second childhood friend and is a flat chested ChineseGirl.
** [[Creator/KanaHanazawa Mikan]] [[ToLoveRu Yuki]] is now a French boy. [[spoiler:[[{{Bifauxnen}} At first...]]]]
** [[Creator/MarinaInoue Yo]][[TengenToppaGurrenLagann ko]] is now an eye-patched German SuperSoldier, who has almost the same character design as [[LyricalNanoha Cinque]], as shown in this [[http://safebooru.org//images/650/e78b4d6d8f06f8f9edf17e6293143e6e66e28d93.jpg picture]].
** [[Creator/MegumiToyoguchi Aq]][[VideoGame/KingdomHeartsBirthBySleep ua]] is now Ven's older sister.
** [[Creator/MaiKadowaki Ror]][[VideoGame/AtelierRoronaTheAlchemistOfArland ona]] is a catgirl pajama wearing side character.
** [[Creator/YukariTamura Nan]][[LyricalNanoha oha]] is now the creator of the I.S. machines themselves. [[OhCrap Get ready]] [[DefeatMeansFriendship to be "befriended"]].
** By the time Season 2 came in:
*** [[Creator/ChiwaSaito Louise]] [[MobileSuitGundam00 Halevy]] is now the StudentCouncilPresident, and [[Main/SuzukoMimori Pinkie]] [[WesternAnimation/MyLittlePonyFriendshipIsMagic Pie]] is her younger sister... who is apparently a big fan of [[NobuyukiHiyama Guy]] [[Anime/GaoGaiGar Shishioh]] in a Super Sentai show.
*** And how the hell did [[Creator/AiKayano Saori]] [[Anime/GirlsUndPanzer Takebe]] end up as a black-haired AxCrazy BloodKnight working for Phantom Task?
* HeyItsThatVoice (dub):
** [[JoshGrelle Ken]][[KenichiTheMightiestDisciple ichi]] as Ichika.
** [[Creator/MonicaRial Tsu]][[SoulEater baki]] as Houki.
** [[Creator/BrittneyKarbowski Ki]][[DarkerThanBlack ko]] as Cecilia.
** [[Creator/HilaryHaag Tes]][[LightNovel/FullMetalPanic sa]] as Lin.
** [[PumpkinScissors Elis]] with a thick French accent as Charles.
** [[TiffanyGrant Hot]][[RahXephon aru]] with a thick German accent as Laura, double points for she was once [[Anime/NeonGenesisEvangelion Asuka]].
** [[Creator/LuciChristian Kan]][[LightNovel/FullMetalPanic ame]] as Chifuyu.
** [[LightNovel/FullMetalPanic Mao]] as Tabane.
* TheOtherDarrin: Not for the voice actors, but for the illustrators. Okiura has been I.S's illustrator for the first seven volumes. From volume 8 onwards (as well as reprints), CHOCO replaces Okiura as illustrator as part of the author switching publishing companies.
** Double for the animators: Media Factory was tasked with animating the story, until Overlap took over by the second OVA and season 2.
* RelationshipVoiceActor:
** ''KingdomHearts'' fans will finally have their wishes granted with the Orimura siblings: making [[KoukiUchiyama Ventus]] and [[Creator/MegumiToyoguchi Aqua]] as siblings.
** KoukiUchiyama has another harem in ''Manga/BinbouGamiGa'', which includes Creator/KanaHanazawa's character (whose name is Ichi''ko'').
*** And also in ''Manga/{{Nisekoi}}'' as Raku Ichijou and Kosaki Onodera, respectively.
* ScheduleSlip: Due to the author's health, the sixth novel was delayed until December 2010, which was a six month gap between Volumes 5 and 6. Before this, the volumes had never been more than three or four months apart.
** After Volume 7 was published in April 2011, the author apparently had some kind of dispute with his publishing company. The result was that Volume 8 didn't get published until April 2013. In June 2013, Yumizuru mentioned (in an author's note in the reboot manga's 1st chapter) that he was working on Volume 9, but it still has yet to be released.
* TheWikiRule: Still small, [[http://infinite-stratos.wikia.com/wiki/Infinite_Stratos_Wiki but it's there]].