History Trivia / UnderNightInBirth

** Hatsumi Takada voices both Hilda and Kuu, as well as filling in for the default system voice.

* AllStarCast: A retroactive example. A lot of the actors brought on would go on to become very prolific all through the UsefulNotes/TheNewTens, including the likes of Creator/AyaneSakura, Creator/SaoriHayami, Creator/NaoTouyama, Creator/YukiKaji, and Creator/YoshitsuguMatsuoka.

* AllStarCast: A retroactive example. A lot of the actors brought on would go on to become very prolific all through the UsefulNotes/TheNewTens, including the likes of Creator/AyaneSakura, Creator/SaoriHayami, Creator/NaoTouyama, Creator/YukiKaji, and Creator/YoshitsuguMatsuoka.

** Both Linne and Kuon are voiced by Creator/AyaneSakura. Bonus points for the both of them being siblings.

* TheOtherDarrin: Rather than Creator/RioNatsuki voicing for Eltnum just like her ''VideoGame/MeltyBlood'' counterpart, Creator/SatomiAkesaka takes over instead.

** Mami Ozaki, who voices Hiroha and Murayama.

** Kaguya was first elaborated upon during a developer stream on upcoming characters where the likes of Chaos, Nanase, Wagner, Enkidu, and many others were shown off. WordOfGod states that Kaguya is taking longer than usual because they wanted to keep Kaguya's playstyle unique and not have a repeat of characters with weapons such as [[Characters/BlazblueCalamityTrigger Noel]] and [[Characters/ArcanaHeart Petra.]]

*** Tsurugi was also under consideration for being a playable character at one point, and there are files detailing an outline for a possible Chronicle Mode story, detailing his friendship with Hyde, when he got his powers, how the EFG came to be, as well as introducing us to the student council president/leader of the EFG - a student named Sasaki.

* TheWikiRule: [[https://in-birth.fandom.com/wiki/Under_Night_In-Birth_Wiki Under Night In-Birth Wiki]].

* WhatCouldHaveBeen: Eltnum started off as a proof of concept of Sion for a HD remake of ''VideoGame/MeltyBlood'', a remake whose development has never come to pass until the release of ''Type Lumina''.

* WhatCouldHaveBeen: Eltnum started off as a proof of concept of Sion for a HD remake of ''VideoGame/MeltyBlood'', a remake whose development has never come to pass.

* RelationshipVoiceActor: Creator/YuukiKaji, Creator/YoshitsuguMatsuoka and Creator/SaoriHayami would go on to [[RoleReprise reprise]] their respective anime characters in the later French Bread-developed fighting game with the same type of HD engine, ''VideoGame/DengekiBunkoFightingClimax''. Creator/SatomiAkesaka along with one other person also narrate the official character tutorials for said game.
** [[Creator/YoshitsuguMatsuoka Chaos]] himself has several:
*** He and [[Creator/SaoriHayami Orie]] while they've fought each other in the chronicle mode, [[LightNovel/TheIrregularAtMagicHighSchool let's just say the former has unrequited feelings for the latter]]. Orie also has [[Creator/SomaSaito Londrekia]] and [[Creator/RyoheiKimura Hyde]] as fellow classmates (the latter even outside of their universe).
*** Both Chaos and [[Creator/ShizukaIshigami Wagner]] are [[SupremeChef supreme chefs]] [[Manga/FoodWars duking it out with orgasmic food, with the latter being a meat expert]]. [[Creator/YuukiKaji Seth]] also annoys Chaos by calling him "Yuki-chin" all the time in that same series.
*** Chaos has gotten himself in a loop with [[Creator/SaoriOnishi Phonon]] as [[LightNovel/HowToRaiseABoringGirlfriend one love interest out of a few]]. [[Creator/SomaSaito Londrekia on the other hand is just minding himself as someone else's cousin]].
*** Chaos even ended up with [[Creator/SomaSaito Londrekia]] [[Manga/AkameGaKill in the same assassin's guild]] and they both end up rebelling against [[Creator/SatomiAkesaka Eltnum/Uzuki]].
** Later on, both [[Creator/YuukiKaji Seth]] and [[Creator/AyaneSakura Linne]][[note]]or Kuon[[/note]] [[Manga/MyHeroAcademia end up in the same class]].
** To say nothing about [[Creator/ShunsukeTakeuchi Enkidu]] being a producer for a company where the likes of [[Creator/SaoriHayami Orie]], [[Creator/NaoTouyama Vatista]] and [[Creator/AyaSuzaki Mika]] are [[Anime/TheIdolmasterCinderellaGirls pop stars]].

** Older arcade builds of ''Exe:Late'' have [[https://www.youtube.com/watch?v=pJogE_a5N1w an "Akatsuki Demo"]] buried within the DebugMenu, giving Akatsuki his own versus splash, animated like it came straight out of ''VideoGame/AkatsukiBlitzkampf''. Given the [[BossWarningSiren siren-esque guitar riff]] and "WARNING!" text, it's likely that Akatsuki was planned to be a BonusBoss at some point, although it was ultimately scrapped.

** Sakurai and Young Seth, who are both voiced by Aimi.

** Tomomi Mineuchi voices Chitose (Linne's previous body) and [[TheDanza Tomomi]].

** Naomi Ozora provides the voices of Chiharu and Lex.

* FanNickname:
** Carmine is affectionately referred to as "Mine-Chan" by the Japanese fanbase.
** Due to his admittedly [[PrettyBoy handsome]] appearance as well as his [[AnIcePerson powers]], Londrekia has been given the risqué title of "Ice-Twink".

* ActingForTwo:
** Both Eltnum and Uzuki are voiced by Creator/SatomiAkesaka.
** Both Linne and Kuon are voiced by Creator/AyaneSakura. Funnily enough, they're siblings.

** Londrekia was originally going to be Hyde's rival back when Seth didn't exist. It's unknown if the same was going to be for Orie.

* NoDubForYou: It ultimately took an appearance in ''VideoGame/BlazBlueCrossTagBattle'' for the characters to get a dub, with the exception of the 7 characters who never made it in the game.

** Two original versions of Linne had her as a young girl and as an older woman; her current incarnation came to be when a developer suggested combining both versions together.

*** Both Chaos and [[Creator/ShizukaIshigami Wagner]] are [[SupremeChef supreme chefs]] [[Manga/ShokugekiNoSoma duking it out with orgasmic food, with the latter being a meat expert]]. [[Creator/YuukiKaji Seth]] also annoys Chaos by calling him "Yuki-chin" all the time in that same series.

** Londrekia was going to be made playable and scrapped at the last minute ''twice''. Once during production of the original version of UNIB, where he would've been a puppet character with a rapier and a coffin for his puppet, which were given to Chaos, Orie and possibly Uzuki respectively. The second time was when his design was finalized. As datamining shows, he was given introduction text (as seen on his character page) and a placeholder. To even further enforce this, the game review site GameGrin accidentally leaked Londrekia's character art, which has been since deleted off of the site, but the art can still be found around the web. However, he has been officially made playable as of the ''Exe:Late[cl-r]'' update.

** Londrekia was going to be made playable and scrapped at the last minute ''twice''. Once during production of the original version of UNIB, where he would've been a puppet character with a rapier and a coffin for his puppet, which were given to Chaos, Orie and possibly Uzuki respectively. The second time was when his design was finalized. As datamining shows, he was given introduction text (as seen on his character page) and a placeholder. To even further enforce this, the game review site GameGrin accidentally leaked Londrekia's character art, which has been since deleted off of the site, but the art can still be found around the web. However, he has been officially made playable in the upcoming Exe:Late[cl-r] update.
*** The last point was further enforced when the fighting game coverage site Shoryuken interviewed Kamone Serizawa, French Bread's battle planner. When asked if they are done with EXE: Late[st], Kamone responded that nothing has been set in stone but they are interested in adding more content to the current version.
** The setting for the game was originally going to be a much more darker sci-fi setting, similar to VideoGame/BlazBlue. Hyde was still the main protagonist, but looked much older and more similar to Ragna The Bloodedge and the other characters were more darker looking, especially the likes of Waldstein and Hilda.

** The original version of the game was going to have Londrekia, Azel and Phonon in the base roster.

** Due to his rather [[DudeLooksLikeALady effeminate]] appearance as well as his [[AnIcePerson powers]], Londrekia has been given the risqué title of "Ice-Twink".