* HeyItsThatVoice: Virtually ''everyone'' playable in this game!
** [[Creator/RieTanaka Neptune/Purple Heart]] is [[GundamSeed Lacus Clyne]], [[RozenMaiden Suigintou]], and [[VideoGame/{{Persona 3}} Mitsuru Kirijo]].
*** [[Creator/MelissaFahn English Neptune/Purple Heart]] is [[DigimonTamers Rika Nonaka]], [[Anime/CowboyBebop Ed]]… or a [[GhostInTheShell Tachikoma]].
** [[Creator/AsamiImai Noire/Black Heart]] is [[VideoGame/BlazBlue Tsubaki Yayoi/Izayoi]] and [[VideoGame/TheIdolMaster Chihaya Kisaragi]].
*** [[Creator/ErinFitzgerald English Noire/Black Heart]] is [[VideoGame/{{Darkstalkers}} Morrigan Aensland]], [[Series/BlazBlue Bullet]], [[Manga/RanmaOneHalf Kodachi Kuno]], [[VideoGame/{{Skullgirls}} Parasoul]], and [[VideoGame/{{Persona4}} Chie Satonaka]].
** [[Creator/RinaSato Vert/Green Heart]] is [[VisualNovel/UminekoNoNakuKoroNi Ange Ushiromiya]] and [[{{Minami-ke}} Haruka Minami]]. Also a RelationshipVoiceActor to the seiyuu below.
*** [[Creator/TaraPlatt English Vert/Green Heart]] is [[VideoGame/{{Persona 3}} Mitsuru Kirijo]] and [[VisualNovel/FateStayNight Caster]].
** [[Creator/KanaAsumi Blanc/White Heart]] is [[AmagamiSS Miya Tachibana]] and [[{{Working}} Popura Taneshima]].
*** [[Creator/WendeeLee English Blanc/White Heart]] is [[LightNovel/HaruhiSuzumiya Haruhi Suzumiya]], [[Manga/LuckyStar Konata Izumi]], [[VideoGame/Persona4Arena Fuuka Yamagishi]]… [[ManOfAThousandVoices and a lot of other people]].
** [[KaoriMizuhashi Nippon Ichi]] is [[VideoGame/DisgaeaHourOfDarkness Laharl]] and [[NipponIchi Asagi]]. Seems to be a RunningGag [[ActorAllusion with the seiyuu, seeing as she has voiced a lot of Nippon Ichi characters.]]
*** [[Creator/MichelleRuff Nisa]] is [[VideoGame/StreetFighterIV Crimson]] [[VideoGame/MarvelVsCapcom3 Viper]], [[VideoGame/DisgaeaHourOfDarkness Etna]], [[VideoGame/{{Persona3}} Yukari Takeba]], and [[VideoGame/{{BlazBlue}} Carl Clover]]. Makes sense, since she too has voiced a lot of Nippon Ichi characters.
** [[Creator/KanaUeda IF]] is [[VisualNovel/FateStayNight Rin Tohsaka]] and [[VideoGame/BlazBlue Rachel Alucard]].
*** [[Creator/KateHiggins English IF]] is [[Manga/{{Naruto}} Sakura Haruno]], [[Anime/CodeGeass C.C.]], [[Videogame/DeadOrAlive Tina Armstrong]], and [[SoulSeries Natsu]].
** [[Creator/NatsukoKuwatani Gust]] is [[RozenMaiden Suiseiseki]] and [[LightNovel/HaruhiSuzumiya Ryouko Asakura]].
*** [[Creator/CassandraLee English Gust]] is [[{{K-ON}} Ritsu Tainaka]], [[Anime/PuellaMagiMadokaMagica Kyubey]], and [[Videogame/DeadOrAlive Lei-Fang]].
** [[KanakoSakai Compa]] [[CaptainObvious (short for Compile Heart)]] is [[VideoGame/ArTonelico Shurelia]] and [[{{REC}} Aka Onda]].
*** [[Creator/CristinaValenzuela English Compa]] is [[ShinryakuIkaMusume Nagisa Saito]], [[VideoGame/BlazBlue Noel Vermilion/Mu-12, Nu-13, Lambda-11]], [[spoiler:[[VideoGame/BlazBlue Saya]]]], [[{{Skullgirls}} Cerebella]], and [[Anime/PuellaMagiMadokaMagica Homura Akemi]].
** [[MikaKanai Histoire]] is [[Anime/AfterWarGundamX Tiffa Adil]] and [[Anime/CodeGeass Kaguya]].
*** [[StephanieSheh English Histoire]] [[ActingForTwo and Financier]] are [[Manga/{{Naruto}} Hinata Hyuga]], [[{{K-ON}} Yui Hirasawa]], [[VideoGame/{{Persona3}} Metis]], and [[LightNovel/HaruhiSuzumiya Mikuru Asahina]].
** [[Creator/ChiakiTakahashi Magiquone]] [[ActingForTwo and Magic The Hard]] are [[VideoGame/BlazBlue Litchi Faye-Ling]] and [[KimiGaNozomuEien Mizuki]].
*** [[Creator/LauraPost Arfoire and English Magic]] are [[LeagueOfLegends Ahri]] and [[VideoGame/{{Skullgirls}} Valentine]].
** [[Creator/KanaeIto Red]] is [[ShugoChara Amu Hinamori]], [[ShinryakuIkaMusume Sanae Nagatsuki]] and [[MayoiNekoOverrun Fumino Serizawa]].
** [[{{Nao}} 5pb.]] is [[Music/{{Fripside}} fripside's]] original vocalist.
*** [[Creator/MelaLee English 5pb.]] is… ''also'' [[VisualNovel/FateStayNight Rin Tohsaka]] and [[VideoGame/BlazBlue Rachel Alucard]].
*** ...[[TheOtherDarrin except in]] ''mk2'', [[Creator/JulieAnnTaylor where she's]] [[VideoGame/SakuraWarsSoLongMyLove Ratchet Altair]] and [[VideoGame/BlazBlue Tsubaki Yayoi]].
* mk2 adds the following to the list:
** [[Creator/YuiHorie Nepgear]] is [[Manga/LoveHina Naru Narusegawa]] and [[VideoGame/{{Persona4}} Chie Satonaka]].
*** [[Creator/ChristineMarieCabanos English Nepgear]] is [[ShinryakuIkaMusume Squid Girl]], [[Anime/PuellaMagiMadokaMagica Madoka Kaname]] and [[Manga/{{KON}} Azusa Nakano]].
** [[Creator/EriKitamura Uni]] is [[Anime/PuellaMagiMadokaMagica Sayaka Miki]] and [[VideoGame/StreetFighterIV Juri Han]].
*** [[Creator/SarahWilliams English Uni]] is [[Anime/PuellaMagiMadokaMagica Sayaka Miki]] [[RelationshipVoiceActor too]] and [[VideoGame/{{Skullgirls}} Peacock]].
** [[YuiOgura Rom]] is [[Anime/DotHackQuantum Hermit]] and [[LightNovel/{{Campione}} Athena]].
*** [[Creator/ErikaLenhart English Rom]] is [[VideoGame/StarOceanTheLastHope Sarah Jerand]] and [[VideoGame/TheLastRemnant Irina Sykes]].
** [[KaoriIshihara Ram]] is [[AriaTheScarletAmmo Reki]] and [[Manga/MaidSama Suzuna Ayuzawa]].
*** [[Creator/ShelbyLindley English Ram]] is [[ShinryakuIkaMusume Chizuru Aizawa]], [[KOn Mugi Kotobuki]] and [[MagicalGirlLyricalNanohaAs Shamal]].
** [[YukoSanpei Kei Jinguji]] is [[EurekaSeven Renton Thurston]] and ''Seikon No Qwaser's'' Sasha.
** [[YukaKomatsu Chika Hakozaki]] is [[FreshPrettyCure Setsuna Higashi/Cure Passion]] and [[Anime/PantyAndStockingWithGarterbelt Scanty]].
*** [[MichelleAnnDunphy English Chika]] is [[{{K-ON}} Jun Suzuki]] and [[MagicalGirlLyricalNanoha Momoko Takamachi]].
** [[Creator/AkemiKanda Falcom]] is [[MahouSenseiNegima Asuna Kagurazaka]] and [[LightNovel/{{Baccano}} Czeslaw Meyer]].
*** [[Creator/XantheHuynh English Falcom]] is [[ShinryakuIkaMusume Sanae Nagatsuki]], [[Manga/{{K-ON}} Ui Hirasawa]] and [[LightNovel/ZeroNoTsukaima Siesta]].
** [[Creator/KenjiroTsuda Judge The Hard]] is [[Anime/YuGiOh Seto Kaiba]] and [[Manga/KatekyoHitmanReborn Adult Lambo]].
*** [[Creator/KyleHebert English Judge]] is [[TengenToppaGurrenLagann Kamina]], [[VideoGame/StreetFighterIV Ryu]], [[Anime/{{Naruto}} Kiba Inuzuka]], [[Anime/DragonBallZ teen!Gohan]], [[Anime/MobileSuitGundamUnicorn Yonem Kirks]], [[VideoGame/{{Persona 4}} Mitsuo Kubo]], and [[Anime/TekkenBloodVengeance Kazuya Mishima]].
** [[Creator/KentaroIto Brave The Hard]] is [[Manga/{{Bleach}} Renji Abarai]] and [[{{Demonbane}} Kurou Daijuuji]].
*** [[Creator/DavidVincent English Brave]] is [[Manga/{{Bleach}} Grimmjow Jeagerjaques]], [[VideoGame/BlazBlue Jin Kisaragi, Hakumen]], [[Videogame/DeadOrAlive Eliot]], [[VideoGame/TalesOfGraces Richard]], and [[{{Tekken}} Marshall and Forest Law]].
** [[Creator/YojiUeda Trick The Hard]] is [[Manga/{{Basilisk}} Saemon Kisaragi]] and [[KotetsushinJeeg Senjirou Shiba]].
*** [[Creator/DerekStephenPrince English Trick]] is [[Manga/LoveHina Keitaro Urashima]] and [[VideoGame/{{Persona3}} Takaya Sakaki]].
** [[Creator/JunkoMinagawa Linda]] is [[Anime/CodeGeass Cornelia Li Brittania]] and [[{{Catherine}} Erica Anderson]]. [[spoiler: She's also Trisha and Astaroth in that game, but we'll let you figure out why]].
** [[{{Neeko}} Warechu]] is [[Manga/KatekyoHitmanReborn Reborn himself.]]
** [[Creator/LaurenLanda English Cave]] is [[VideoGame/BlazBlue Litchi Faye-Ling]], [[Anime/PuellaMagiMadokaMagica Kyouko Sakura]], [[SoulSeries Yan Leixia]], and [[Videogame/DeadOrAlive Kasumi]].
* And Neptunia V adds a few more:
** [[Creator/KanaHanazawa Pururut/Iris Heart]] is [[LightNovel/{{Bakemonogatari}} Nadeko Sengoku]] and [[LightNovel/{{Durarara}} Anri]].
*** [[Creator/CheramiLeigh Plutia]] is [[MugenSouls Syrma]], [[LightNovel/ShakuganNoShana Shana]] and [[Manga/FairyTail Lucy Heartfilia]].
** [[Creator/KiyoyukiYanada Akudaijin]] is [[VideoGame/MarvelVSCapcom3 Mike Haggar]], [[SlamDunk Takenori Akagi]], and [[VirtuaFighter Taka-Arashi]]. Him voicing an evil Member of Parliament is nothing new, as he has also been [[Series/EngineSentaiGoOnger Yogostein and Yogoshimacritein]].
*** [[Creator/KeithSilverstein Mister Badd]] is [[VideoGame/StreetFighterXTekken Bryan Fury]], [[SoulSeries Zasalamel]], and [[Videogame/DeadOrAlive Zack]].
** [[Creator/PatrickSeitz Copypaste]] is [[VideoGame/BlazBlue Ragna the Bloodedge]], [[{{Tekken}} Bob Richards]], [[SoulSeries Cervantes de Leon]], [[Videogame/DeadOrAlive Bass Armstrong]], [[EurekaSeven Charles Beams]], [[EternalSonata Frederic Chopin]], [[{{Manga/Bleach}} Isshin Kurosaki, Sentaro Kotsubaki, Kenpachi Zaraki]], [[VideoGame/SengokuBasara Chosokabe Motochika]], [[VideoGame/Persona4Arena the Malevolent Entity]], [[VideoGame/StarcraftII Artanis]], [[{{Berserk}} Pippin]], [[AxisPowersHetalia Germany]], [[VideoGame/CastlevaniaJudgment Dracula]], [[ManOfAThousandVoices and]] [[Franchise/MortalKombat Scor]][[VideoGame/InjusticeGodsAmongUs pion]].
** [[Creator/AoiYuki Peashy]] is [[Anime/MadokaMagica Madoka Kaname]].
*** [[Creator/SandyFox English Peashy]] is [[VideoGame/DisgaeaHourOfDarkness Flonne]] and [[VideoGame/PhantomBrave Marona]].
** [[KiraBuckland English MarvelousAQL]] is [[LightNovel/AccelWorld Kuroyukihime]] and [[MugenSouls Chou Chou]].
* MarthDebutedInSmashBros: As ''SteinsGate'' wasn't released in North America until after this game, [[spoiler: Kurisu Makise, Mayuri Shiina, and Itaru Hashida]] ALL made their North American debut in this game as 5pb's Skills.
* NamesTheSame: This Black Heart is definitely not [[Comicbook/GhostRider the son]] [[VideoGame/MarvelVsCapcom2 of Mephisto]] nor a boss from ''VideoGame/BattleGaregga''.
* NoBudget: The first game ran out of money and was mostly unfinished. The second and third games were given a higher budget and received a warmer reception.
* NoExportForYou: Sadly, Australia hasn't gotten any games past the first one. If an Australian wants ''mk2'' or ''Victory'', they'd have to import it.
** ''Vicotry'' eventually got a very small print run down under, and all three games can be purchased from PSN.
* OneOfUs: Katsuhiro Harada, the video game producer of the ''VideoGame/{{Tekken}}'' series likes Noire. And pretty much one of the main reasons why we even get Tekken in ''VideoGame/HyperdimensionNeptuniaV'' (they couldn't get the Namco name so they had to settle for this).
** And Creator/RieTanaka as well. When you can get the platinum trophies of all three games ''[[https://twitter.com/AndyTaichou/status/319266220660621312/photo/1 in the English Version]]'', you're definitely one.
* RelationshipVoiceActor: [[Creator/StephanieSheh Financier]] as [[Creator/WendeeLee White Heart's]] assistant in the first game.
** The English dub of ''mk2'' has at least five [=VAs=] who have worked on ''Manga/ShinryakuIkaMusume'', six who have worked on ''Anime/KOn'' and ''seven'' who have worked on ''Anime/PuellaMagiMadokaMagica''.
* ShoutOut: [[ShoutOut/{{Neptunia}} Now has its own page.]]
* TheOtherDarrin: 5pb., voiced by Creator/MelaLee in the first game, is voiced by Creator/JulieAnnTaylor in the second.