* [[{{Anime/GaoGaiGar}} Gaogaigar-tan]] - Subaru Nakajima of ''[=StrikerS=]'', due to the blatant King of Braves references in her transformation sequence and attacks. There is a video of her transformation to the Gaogaigar transformation music [[http://www.youtube.com/watch?v=nHpKU3apXQE here]].
** [[spoiler:Lezbot]] - for "[[LesYay Rainbows Are Straighter]]" and [[spoiler:RoboticReveal.]]
*** And, by extension, "She who rainbows are straighter than".
* Loli-Rider - Lutecia, also of of ''[=StrikerS=]'', due to her resemblance to Rider of ''VisualNovel/FateStayNight''.
** Considered HilariousInHindsight as there now exists an actual ''[[VideoGame/FateGrandOrder canonical]]'' [[http://fategrandorder.wikia.com/wiki/Medusa_(Lancer) Loli Rider]] -- technically, though, she's a Lancer.
* Signum Loveless - Signum, [[VideoGame/SuperRobotWars Lamia's]] magnificent {{Expy}}.
* Spaghetti - Jail Scaglietti.
* Due to her rather serious personality, the professional way she deals with most combat situations, and of course, her Eyepatch, some fans have referred to Cinque as "Little Boss" as a ShoutOut to Big Boss of the Metal Gear series.
* The White Devil - Takamachi Nanoha herself; sweet, friendly, and ''very'' firm believer in vicious asskickings for the sake of love and justice. So named after a scene where an enemy calls her a devil, and she agrees that she is if that is what works. This is combined with her wearing all white, her proficiency at [[StuffBlowingUp blowing things up]] that would make a HumongousMecha proud, and the fact that the original Gundam was nicknamed the White Devil in ''Anime/MobileSuitGundam''.
** We also have the "White Devil Incident", where one of her students suffers from a HeroicBSOD and attacks her for real during training. Looking very disappointed, she ''[[BareHandedBladeBlock catches]]'' said student's HardLight blade, drawing blood and incidentally ''physically supporting her in midair'', then blasts her into submission without even using her [[MagicWand Device]]. People started using the nickname seriously after this.
** [=StrikerS=] also has Nanoha sport [[AttackDrone Blaster Bits]]: Nanoha got an upgrade from [[Anime/MobileSuitGundam the RX-78-2 Gundam]] to [[Anime/MobileSuitGundamCharsCounterattack the RX-93 Nu Gundam]]. This is incontrovertible proof that Nanoha '''is''' a Gundam in MagicalGirl form.
** Also known as The Demon Cannon Girl or Magical Cannon Girl, a pun on the name of her genre "mahou shoujo" (MagicalGirl): "mahou" (magic/magical arts) and "ma" (demon) "hou" (cannon) are pronounced the same.
** Similarly, her CatchPhrase "Zenryoku zenkai!" ("Full power! Full Throttle!") can be also interpreted to mean "Full Power! ''Total destruction!''"
** Some fans have been known to refer to her as "Sailor Beamspam".
** Over on the Japanese side of the Internet, there's a growing movement to nickname her "Nanorymer" or simply "Hades" (''meiou'') on account of certain parallels between her [[{{Flanderization}} fan-depiction]] and the title robot of ''Manga/HadesProjectZeorymer''. This may be partly on account of how Zeorymer in the ''VideoGame/SuperRobotWars'' games is considered a GameBreaker (although gameplay-wise, Zeorymer resembles Yagami Hayate a lot more -- especially Great Zeorymer).
* Cardiche, aka the Fatemobile - Fate Testarossa-Harlaown's black convertible in ''Anime/MagicalGirlLyricalNanohaStrikers'', So named because its black coloration and yellow hubcaps gives it a more than passing resemblance to [[EmpathicWeapon Fate's Intelligent Device]] Bardiche. Unusual, because Fate's powers already allow her to travel quickly and because it wasn't (in fact, it didn't even resemble) an actual [[VehicularThemeNaming Ferrari Testarossa]].
** Ditto Hückebikes, the {{Cool Bike}}s that the members of the Hückebein family ride in ''Force''.
* "Befriending" - Yes, the trope of DefeatMeansFriendship has been given a nickname, due to it being the primary way Nanoha makes her friends. Used in a sentence; "She befriended the crap out of them."
* Hayate's Lesbian Army - The 6th Mobile Division; Hayate's in charge, it's an ImprobablyFemaleCast, and there's a whole lotta LesYay.
* The Energizer Bunny - the fluffy bunny that appears to be (or more accurately, contains) Vivio's Device in the ''[=ViVid=]'' manga, because the [[NitroBoost cartridge system]] that many other Devices are equipped with uses cartridges that look a lot like batteries.
* The Doom Bunny - Vita
* Zaffy - Zafira. Used in the sound stages by Vivio.
* Etnagito - Agito, for her resemblance to Etna of ''VideoGame/{{Disgaea|HourOfDarkness}}''.
* Ferret Boy - Yuuno.
** The Japanese fandom has apparently dubbed him "Inju" (Sex Beast) because of his [[DoesThisRemindYouOfAnything unfortunately-shaped ferret form]] and his status as one of the few males in an ImprobablyFemaleCast. Likewise, Chrono has somehow morphed into "Erono".
* [[DeusExMachina Deus Ex]] [[MaskPower Maskina]] - The Wolkenritter' MysteriousProtector[[spoiler:s]] in A's, ([[spoiler:the Lieze twins]])
* Emoha - The movie manga version (which is a different continuity from the movie itself) of Nanoha has this nickname due to being more wangsty to some people compared to the original. She's certainly more angsty than the original Nanoha, but the fifth chapter gives her a good reason for that.
* Ginga Drill Break(er) - for one of Ginga Nakajima's [[ThisIsADrill attacks]] that's reminiscent of ''Anime/TengenToppaGurrenLagann''.
* [[Anime/MobileSuitGundamWing Heavyarms-tan]] - Arnage of Hückebein, due to the Reacted form of her Divider being {{Gatling G|ood}}uns and missile launchers.
* With regards to the White Devil Incident, there is also "Signum Punch", or Signum's [[GetAHoldOfYourselfMan response]] to [[QuitYourWhining Teana still not getting it]]. (Compare [[http://knowyourmeme.com/memes/falcon-punch Falcon Punch]]; coincidentally, Signum's ultimate attack from A's is Sturmfalken[[note]]Storm Falcons[[/note]].)
* Reinforce Eins: A way of referring to the first Reinforce, as opposed to Reinforce "Rein" Zwei. Becomes eventually a canon name.
* The Ace Trio/The TSAB Aces: The collective term for Nanoha, Fate, and Hayate. Note that among the three, Nanoha and Fate are legitimately recognized as Aces in universe, with their titles reflecting this fact [[RedBaron (Nanoha being the "Ace of Aces" and Fate being "The Ace of the Navy")]]. Hayate on the other hand, has admitted to lack the personal combat skills that would make her an asset on the battlefield, thus relegates herself to command duties. [[RedBaron Her official in universe title is "The Walking Lost Logia"]] [[PersonOfMassDestruction because almost all of her spells have the destructive power of a nuke.]]
* The Materials didn't really had official names in ''VideoGame/BattleOfAces'', so fans came up with Seikou for Material-S, Rai or Raikou or Raijin for Material-L and Yami for Material-D. Until ''VideoGame/GearsOfDestiny'' came out.
* Signum Mk. II - Micaiah Chevelle, another swords(wo)man.
* [[spoiler:Chibi Ix]] for Ixpellia, after her [[spoiler:"awakening" in chapter 63]].
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