Manga Adaptation: A very odd case: Besides the gamebooks, we have also, not one or two, but six different manga adaptations from both the original series and Rebellion:
Queen's Blade Anthology: An anthology of short, funny, stories from many different artists.
Queen's Blade Rurou no Senshi: The manga adaptation of the first anime season, but with some differences in plot.
Queen's Blade Hide & Seek: The same as the above, but the plot is seen from Elina's POV, and many different stuff from the original plot of the anime. Also includes the plot of the second season.
Queen's Blade Rebellion Zero: An interquel that takes place between the events from the OVAs and the regular Rebellion series, but with a more darker plot.
Queen's Blade Rebellion: The Princess Knight of the Blue Storm: The manga adaptation of the Illustrated Stories (not from the anime) who expands some unexplained stuff from them.
Now Which One Was That Voice: In a odd inversion of this trope, Owen's Japanese voice isn't listed in the final episode cast list and, to this date, it hasn't been explained why he's not listed in the cast. Averted with his English voice actor.
Played straight with Delmore's English voice actor.
Pop Star Composer: Naomi Tamura, who sings the OP theme of Queen's Blade Rebellion is maybe well known for singing the catchy opening themes in Magic Knight Rayearth, another fantasy series.
Recycled Script: The script of the second Beautiful Warriors OVA recycles the plot of the Queen's Blade Bitoshi Retsuden: Adventure of the Vagrant Warrior book who originally starred Leina and Claudette vs Nyx. They're replaced by both Nowa and Alleyne instead, and the battle against Nyx is in a beach in the OVA rather than a volcano like in the book.
Most of the female cast of the series also worked in the Japanese dub of Cold Case. The hilarious part of this is most of them voiced many of the victims or murderers of that series. Even more hilarious is the fact that Atsuko Tanaka (Claudette) dubs the main protagonist, Lilly Rush, whose main job is solve those murders.
By sheer coincidence (or maybe not), most of the female cast also worked in the Touhou's few voiced works:
Aya Endo (Annelotte) voiced Yukari Yakumo in the Koumajou Densetsu doujin game and Kikuko Inoue (Branwen) also voiced Yukari in the Touhou Musou Kakyou fan-anime. This also makes the the entire scene when both Annelotte and Branwen faces off extremely funny since Yukari is literally beating the crap out of herself.
Yu Kobayashi (Siggy) voiced her shikigami, Ran Yakumo.
Ayako Kawasumi (Leina) voiced Gwendolyn, who shares her background, but her personality mimics Claudette instead.
Mamiko Noto (Tomoe) voiced Mercedes, whose personality is more akin to Nanael, being both winged beings with annoying personalities.
Sayaka Ohara (Melpha) voiced Griselda, who shares Maria Vance's background (being the respective dead relative who everyone idolizes, except in Odin Sphere, she voiced the dead elder sister)
Takako Honda (The Head Archangel) voiced Queen Elfaria, who is also a winged being and a Big Good, except she dies early in the game, and being an authority figure for another winged being (Nanael in QB and Mercedes in OS, being the latter her daughter)
What Could Have Been - Originally, the Queen's Blade Spiral Chaos game was planned as a multi-series crossover game Super Robot Wars-style, but using non-mecha series (besides Queen's Blade, other anime series were planned to appear) but it wasn't possible those series to be included, due to the authors and companies being reticent to allow their characters being crossed-over with other characters from other series. The sequel, Queen's Gate Spiral Chaos is the closest thing to the original idea Banpresto was able to get and still they weren't allowed to use Kasumi from the Dead or Alive series and she's replaced with both Wonder Momo and Noel Vermillion instead.
It's very possible the reason why Kasumi wasn't included is because Tomonobu Itagaki (the former Dead or Alive director) trashed Tekken (a Namco Bandai franchise) really hard and it's possible that Namco Bandai doesn't want Kasumi being crossed-over along with Lily from Tekken
Curiously, possibly most of that original idea was used in Heroes Phantasia, another Banpresto crossover game for the PSP.
Many characters in their development were somewhat different to their final designs:
The Vance sisters and Melpha are the only characters who didn't change too much from the original drafts to the final ones.
Tomoe originally was planned to use a rabbit-shaped samurai helmet, not to mention she was planned with different haircuts besides her definitive one.
The same goes for Shizuka, who had many different haircuts (one of those haircuts looked like Sarutobi Sasuke'sWild Hair) and originally was planned to use a yukata.
While Aldra didn't change a lot from her early drafts, on the other hand Delmore looked more muscular and he looked more like a Stand or a Oversoul, not to mention he had a sword for a hand.
Melona was planned to look more like a cat, rather than a girl with rabbit ears.
Echidna originally was planned to wear odangos, not to mention her dress was originally more conservative than her definitve one.
Menace was planned to use a very elaborated hat, rather than a tiara.
Nowa is possibly the most bizarre case of all: She was not planned to be a fighter or even being humanoid at all: She was planned originally to be a flying squirrel!note Possibly as Alleyne's Non-Human Sidekick.
Risty originally had straight hair rather than her Wild Hair.
Nanael was originally planned as a Meganekko, but not different from her final design.
Eilin was intended to use a ribbon instead of her katusha.
Siggy has two different previous designs before her definitive one: One was more Stripperific and the other was more conservative instead, and used a kusarigama rather than her cross-chain.
Huit used a hat, rather than her leaf ribbon, and Vignt used tighter shorts rather than her skirt.
Tarnyang was originally planed to use a spear, rather than her Chinese sword or jian.
Branwen is maybe one of the characters with the most changes before her final design: She originally was planned to have short hair, other using a horned tiara and another one with another tiara with bigger horns.
