* ActorAllusion: Japanese only: Creator/KenyuHoriuchi (Wernharde) in charge of an organization whose [[spoiler:previous leader killed Kazuma's lover.]] [[Anime/GunXSword Where have we seen this before?]] Although it's subverted that [[spoiler:Wernharde didn't do it and Kazuma already killed his lover's killer.]]
* DiedDuringProduction: Takahiro Yamato was unable to finish the story, after having died in July 2009.
* DuelingShows: This with ''Literature/ShakuganNoShana''.
** Driven to CastingGag levels now that Shana will be voiced by Creator/CheramiLeigh (Ayano's VA).
* TheOtherDarrin: Misao was first voiced by Creator/JadSaxton in the third episode and then Creator/MonicaRial in the fifth episode.
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