* CrossDressingVoices: It's very difficult to remind oneself that Honey is male when [[HeyItsThatVoice he sounds like]] [[Anime/PrincessTutu Duck(Ahiru)]] and [[VisualNovel/{{Clannad}} Nagisa Furukawa]] [[Creator/LuciChristian in English]]. This trope also applies [[Creator/AyakaSaitou in Japanese]].
* FanNickname: "Haruhi Potter".
* HeyItsThatGuy:
** In the live action adaptation, four of the main characters will be played by Tokusastu actors:
** Tamaki is [[Series/KamenRiderKabuto Kamishiro Tsurugi]];
** Honey is [[Series/TensouSentaiGoseiger Alata]];
** Kaoru is [[Series/JukenSentaiGekiranger Retsu Fukami]], while Hikaru is his evil doppelganger from Episode 38 (and [[Series/HikoninSentaiAkibaranger Takuma]]).
*** RetroactiveRecognition: And now Nekozawa will be [[Series/ZyudenSentaiKyoryuger Kyouryu Red]]!
* HeyItsThatVoice: Going down the list, we have the voices of [[Manga/FullmetalAlchemist Winry Rockbell, Edward Elric, Roy Mustang]], [[Manga/OnePiece Nami, Eneru, Kohza]], and [[Manga/MahouSenseiNegima Negi Springfield]] for our main cast in the dub. As well as [[Manga/MahouSenseiNegima Konoka]] as a recurring character and [[VisualNovel/{{Shuffle}} Rin]] as a one-episode supporting role.
** In the drama [=CDs=], [[Anime/SailorMoon Sailor Mercury]] was Haruhi.
** There's also a sly TakeThat to Gundam characters being Bishounen.
*** In the Anime, [[Creator/MamoruMiyano Tamaki is Setsuna]], [[Creator/YujiUeda Nekozawa is Billy]], and in a rare case of PlayingAgainstType, [[Creator/TakehitoKoyasu Ranka]] is [[Anime/MobileSuitGundamWing Zechs]], [[Anime/TurnAGundam Gym]], [[Anime/MobileSuitGundamSEED Mwu]], and [[Anime/MobileSuitGundamAGE Frederick]]. To top it all off, [[Creator/MitsukiSaiga Benibarra-sama]] is supposedly [[Anime/MobileSuitGundam00 a male-pattern Innovade...]]
*** In the Drama CD, [[Anime/MobileSuitGundamWing Tamaki is Heero]], [[Anime/MobileSuitGundamSeed Hikaru is Kira]], [[Anime/MobileSuitGundamSeedDestiny Kaoru is Shinn, and Kyouya is Sting.]]
*** In fact, the designation of Tamaki's seiyuus is actually a mild case of PlayingAgainstType, considering the fact that the two characters as mentioned earlier are [[TheStoic stoics...]]
** In the Japanese anime, Tamaki is [[Manga/DeathNote Light Yagami]]. What's also funny is that Haruhi is also Kiyomi Takada...
** ... ''and'' Kyoya is Teru Mikami.
** And Nekozawa is [[Manga/RurouniKenshin Sanosuke]].
** Due to the dub being Funimation, some of the voice actors are the same as in their previous dubs. For instance, Kasanoda and Tetsuya are Ayame and Shigure from ''Manga/FruitsBasket''. Haruhi's father is Ritsu (also a cross dresser, interestingly).
** [[Manga/SoulEater Tamaki is Death the Kid. Haruhi is Crona. Hikaru is Killik. Kaoru is Justin. Honey is Angela. Haruhi's dad is Excalibur. We could go on.]]
*** In the dub, Tamaki is Death Scythe. Hikaru is Death the Kid. Mori is Free. Hunny is Medusa. Haruhi is Kim.
** In ''Manga/BlackButler'' Haruhi is Ciel and Eclaire is Ciel's fiancee, Elizabeth, in the original Japanese. In the English dub Honey is Alois and Kyouya is Sebastian...
** We all know Kyouya isn't the nicest guy around, but even he doesn't beat the [[ScaryShinyGlasses light-catching prowess]] of VA-mate [[Manga/BlackCat The Doctor]]. Honey is kid!Train, Chika is Leon, Haruhi is Saya, Kaoru is Shiki... the list goes on.
** Hey, Tamaki took Anime/{{Naruto}} as an apprentice and [[AllGirlsWantBadBoys he]] turns out to be a better ChickMagnet.
** Kyoya thinks that [[Webcomic/AxisPowersHetalia America and England]] need to do something about their tacky military clothes as well as their sexual tensions.
** After voicing Hikaru, it wouldn't be the last time that ToddHaberkorn would voice an [[VideoGame/StreetFighterIV older twin]].
*** And Hikaru [[Webcomic/AxisPowersHetalia keeps Machiavelli in his suitcase]] and would really like some Pasta.
*** And Nekozawa has probably replaced Beelzenef with [[MemeticMutation Herr Schtick]].
* NonSingingVoice: Inverted with Haruhi; revealed in Episode 19, she doesn't even get an ImageSong! [[IronyAsSheIsCast Ironically]], both [[Creator/MaayaSakamoto her seiyuu]] and [[Creator/CaitlinGlass English voice actress]] are known for their singing abilities.
* PlayingAgainstType: In the dub, the cultured, sweet and hilarious Tamaki is voiced by [[Anime/DragonBallKai Broly]], the bloodlusting Saiyan.
* SurpassedTheTeacher: Hatori Bisco herself is an example of this, given that she used to be tutored to an extent by Hino Matsuri, the author of ''Manga/VampireKnight'', who at the time was a more experienced mangaka (and ''Vampire Knight'' being more popular than Ouran to boot), whom Hatori greatly admired and looked up to. Eventually however, ''Vampire Knight'' suffered from SeasonalRot and a steep loss of popularity along with it, while Ouran continued to climb the ladder of most successful shoujos, making it as far as to the top 10 list in Japan and even surpassing shounens such as ''{{Manga/Bleach}}'' (a rare accomplishment for a shoujo). In contrast, Hino Matsuri was told to end her story earlier than she wanted, her decrease in storytelling-quality and popularity not leaving ''Vampire Knight'' substainful enough for the [=LaLa=] magazine anymore (same one as Ouran was published in). Ouch.
* WhatCouldHaveBeen: Originally, Kyouya's character didn't exist. The reason Hatori created him was because she was told to add seven more pages to the first chapter. Hence, she figured she needed an extra Host Club member.
** Apparently, Hatori was originally considering Haruhi and Mori to fall for each other. This idea might be referenced in chapter/episode 7 where Haruhi blushes when Mori first calls her by name, and they spend some alone time where she's willingly carried by him.
** Re: Kyouya: where was this said? In my copy it's the other way around, that if she had 40 pages instead of 50 that she would have had to ''remove'' him.
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