http://static.tvtropes.org/pmwiki/pub/images/chevalier_deon_0021.jpg
Late 18th Century France: a time of great trial and turmoil--and for none moreso than French Secret Police member d'Eon de Beaumont, whose older sister Lia has just been found floating in a coffin in the Seine River. Lia was an accomplished spy for the French Court, which recently sent her to faraway lands on a mysterious assignment. But now she's turned up murdered, and it's up to D'Eon to find her killers. No sooner has he stumbled upon the AncientConspiracy that might be responsible for it, than he, [[DoomedHometown his comrades, and his entire household all fall victim to a vicious attack]], which [[EverybodysDeadDave only D'Eon himself manages to survive]]. The King of France, Louis XV, graciously allows D'Eon to retrace his sister's steps and investigate her murder, and to that end he gives him a new set of comrades; all of them are Chevaliers who, like D'Eon, have vowed their unswerving loyalty to the King, even unto death.

Of course...this isn't the ''only'' help D'Eon will receive during his investigations.

It seems the angry soul of his murdered sister, Lia, has decided ''not'' to pass onto the next life just yet. She has some unfinished business to attend to. And [[GrandTheftMe she has found the perfect vessel through which she can carry out her revenge]]--D'Eon's ''own'' still-living body...

Loosely inspired (''very'' loosely) on the historical spy [[http://en.wikipedia.org/wiki/Eon_de_Beaumont D'Eon de Beaumont]], whose crossdressing (in retrospect, s/he was probably transgender, and s/he insisted for the latter half of his/her life that s/he had been a woman all along and had been disguised as a man previously) and extraordinarily half-hearted attempts at espionage caused a major international incident.

The show itself is based on a series of novels by Tou Ubukata; a manga was released at around the same time as the show, but is completely different, being described by Ubukata as "a humorous attempt at combining d'Eon de Beaumont, eighteenth century France, and a superhero story". While the anime is a serious historical drama with mystical elements, the manga is a {{Seinen}} action series similar to ''Manga/{{Hellsing}}''. Despite being a completely different animal, it's definitely worth a look.

The show [[SpiritualSuccessor noticeably draws from]] the 1970's {{shojo}} {{anime}} ''Manga/RoseOfVersailles''.
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! '''This show provides examples of:'''

* AffablyEvil: The Count of Cagliostro and Lorenza, arguably the Comte De Guercy (who's more of a LovableTraitor) and [[spoiler: King Louis XV]]
* {{Alternate History}}: An interesting example: instead of beginning from a point of divergence, it begins at a point that is in accordance with actual history, and slowly begins to diverge as the plot unfolds, and various historical figures meet very different fates than they did in real life.
** It acknowledges this in the closing credits, where [[spoiler: the dates of death are given for the real Madam De Pompadour and Queen Marie, who died two years apart. But in the series, they die ''on the same day.'']]
*** The show cleverly uses this trope to [[spoiler: fool the viewer into thinking that its version of Robespierre is part of the alternate history. In fact, the man who goes by that name for most of the series isn't the one we know from history; the "real" Robespierre doesn't reveal himself until the final episode, and things line up much closer to reality with him.]]
* AncientConspiracy: Given the number of powerful bigwigs and bureaucrats involved with it, it can easily qualify as a GovernmentConspiracy as well.
* AnyoneCanDie: [[spoiler: More like, almost everyone DOES die.]]
* AudibleSharpness
* BackFromTheDead
* BattleAura
* BecauseDestinySaysSo: The prophecies within "The Verse of the King" have the power to shape history as well as predict it.
* BigBrotherInstinct: Actually, a Big Sister Instinct -- with Lia protecting D'Eon, the younger and weaker of the two.
* BilingualBonus: If you can read French, you can learn what the king's letter to Durand said early.
* BodyHorror
* BreakTheCutie: Robin is probably the happiest and most optimistic member of the main cast early in the series. By the end, however, he's become so angry and disillusioned he [[spoiler: changes his name and becomes the historical Maximilien Robespierre, responsible for the Reign of Terror.]]
* BrotherSisterIncest: D'Eon and Lia are [[IncestSubtext close]] (''uncomfortably'' close, now that they have to share the same body), but they've never felt anything improper towards each other. [[spoiler: However, the relationship between half-siblings Lia and Maximilien Robespierre ''was'' almost consummated, although [[SurpriseIncest neither of them knew]] they were related to the other at the time of their romance.]]
* CatherineTheGreat
* CoolDownHug: Teillagory gives one to Lia [[spoiler: after she thinks Maximilien is dead.]]
* CoolOldGuy: Teillagory
* DeadlyDistantFinale
* DoomedHometown
* DownerEnding: Considering it takes place right before [[FrenchRevolution Maximilien Robespierre's Reign of Terror]], it was a ForegoneConclusion that it would end this way.
** The show still makes a very fine point of ending things on a tragic note, though. [[spoiler: The last scene of the series is of D'Eon as a sad old man who has lost everyone he ever loved.]]
* DressingAsTheEnemy
* ErmineCapeEffect: Although it's justified by the LimitedWardrobe.
** Though things ''do'' get bleaker and grimier towards the end. Especially considering that the story ultimately leads to the FrenchRevolution.
* EverybodysDeadDave
* EverythingsDeaderWithZombies: The gargoyles.
* EvenTheGirlsWantHer: Lia was and still is loved and adored by ''everyone'' who knew/knows her, male of female.
* EvilAllAlong: [[spoiler: Teillagory is a spy for the Duc D'Orleans, and King Louis is an imposter who is prepared to kill those who discover his secret]]
* FaceHeelTurn
* FirstEpisodeResurrection: An interesting variation; It's not ''his'' death and resurrection which gives D'Eon his powers, but his sister's. And it takes a traumatic event to "activate" them, as often befits this trope.
* {{Flynning}}: Averted outside of staged fights, when two enemies are engaged in a fight, they go straight for the kill.
* GambitPileup: It would be easier to list the characters who ''didn't'' have some grand scheme.
** "The extras in the crowd scenes." Done!
* GrandTheftMe: A slightly gentler form, where the soul "appropriating" a body shares it with its owner -- although not always equally at all times.
* GuileHero: Durand, who fools both allies and enemies to accomplish his goals.
* HatDamage: Teillagory is very sad about his hat taking damage in battle. Except it's the only thing that's taken damage as his opponents all on the ground.
* HermeticMagic: The FunctionalMagic system used by the AncientConspiracy is a complex combination of Alchemy and Rune magic. It's practitioners are called "Poets" and the "spells" they chant are actually Psalms from the Bible. (A poet has to have their hearts "opened to the Psalms" in order to use them, though.)
* HistoricalDomainCharacter: More of the cast than not.
* HistoricalInJoke: The entire series is one (albeit a very serious one) which details the behind-the-scenes events that lead up to the French Revolution and Catherine the Great's rise to power in Russia, amongst others. Many of the characters (including the hero) are actually based on real-life people from that era.
** The thing about this show is that you're meant to take it seriously, but it does not take ''itself'' seriously. Which accounts for the immense historical inaccuracies.
*** Or rather, it takes itself seriously as an alternative history. It just doesn't seem like one at first.
* ImplausibleFencingPowers
* ICannotSelfTerminate: Everyone who's been turned into a gargoyle but still has some control over their mind, such as Bernis and [[spoiler: Durand. D'Eon kills both of them]]
** Also [[spoiler: King Louis XV, once he burns the psalm and starts decaying]]
* InstantRunes: Appear as the words of the Psalms in Latin, which are able to appear out of nowhere, crawl around and affect any surface they touch.
* KillTheCutie: [[spoiler: Anna gets shish-kabobbed by King Louis when she walks in on him poisoning Queen Marie]]
* KnightTemplar
* LargeHam: The Compte De Guercy
* LifeOrLimbDecision: [[spoiler:Durand cuts off his own arm to keep himself from being controlled via the Psalms.]]
* LukeIAmYourFather: [[spoiler: Lia and Maximilien Robespierre aren't only half siblings, they're also the children of the last king, Louis XIV. And it turns out that Madame de Pompadour is the "mommy" of the skull that Queen Marie is always carrying around.]]
* MexicanStandoff
* MyMasterRightOrWrong: Durand is exceptionally loyal to his king, which becomes a point of conflict both for him and the series in general.
* TheMistress: Pompadour
* TheMole: [[spoiler:Teillagory serves Philippe II]]
* NiceHat: Teillagory
* NinjaPirateZombieRobot: Axe-wielding Parisian zombie whores!
* OffingTheOffspring: [[spoiler: Madame de Pompadour strangled her own child.]]
* OnlySixFaces: Some character designs are nearly identical, like the Queen of France, and the Empress of Russia. Lia and D'Eon don't count, since they are supposed to look similar.
* OurZombiesAreDifferent: They're called "gargoyles," their blood is mercury, and they are controlled by a Poet and can be killed by destroying a rune somewhere on their body
* OutOfClothesExperience: [[spoiler: Durand, at the moment of his death.]]
* PatheticCharacterPatheticDeath: Peter
* PimpedOutDress: Loads of them, given the opulence of the period.
* PsychicPowers
* ReligionIsMagic: And psalms are spells.
* RequisiteRoyalRegalia
* SecondEpisodeIntroduction: Durand and Teillagory
* SeparatedAtBirth: Robespierre and his half sister
* SharingABody: D'Eon and Lia.
* ShootTheDog
* SlipknotPonytail: Every time Lia possesses D'Eon's body.
* SmugSnake: The Duc D'Orleans is significantly less accomplished compared to most of the other villains, with the possible exception of Piotr and the Marquise De Pompadour
* SpiritAdvisor: The child's skull that Queen Marie carries around, dresses up, and speaks to all the time. Only near the end of the series do we learn of the child's true identity. The skull also pulls duty as a WaifProphet, and were it still alive, it would probably be a CreepyChild as well.
* SpiritualSuccessor: To ''RoseOfVersailles''
* SpoilerOpening: [[spoiler:If you pay attention during the opening, you can clearly see that Teillagory is kneeling in front of the Philippe II, Duke of Orléans. Considering Philippe is portrayed as a villain, Teillagory turning out to be a mole is not very surprising at all.]]
** However, [[spoiler: you don't see the Duke's face, or anything but the very top of his head, making it near-impossible to determine who Teillagory is kneeling before, so it's easy to just write off the scene as being emblematic of his status as a loyal knight. Of course, once the revelation is made, it seems obvious.]]
* SwordSparks
* {{Synchronization}}
* TapOnTheHead: Subverted in the scene where Robin tries to knock a guard unconscious with the butt of his pistol. He only succeeds in hurting the guard, and has to resort to a more vigorous attack to bring him down.
* TearsOfBlood
* TomeOfEldritchLore: The "Royal Psalms", which doubles as an EmpathicWeapon, "choosing" those who can carry or read it.
* TransformationSequence: When D'Eon changes into Lia, [[SlipknotPonytail his hair usually comes loose]] and his lips become more feminine. It's more subtle than most transformations, but still dramatic.
** This is [[PlayingWithATrope played with]] later on; [[spoiler: it is revealed about halfway through the series that when two souls occupy the same body, they slowly lose their individuality. Sure enough, the differences between D'Eon and Lia become more and more subtle to the point that by the end of the series, the show no physical changes when they switch.]]
* UncannyFamilyResemblance: D'Eon and Lia look very similar to each other, which is a major plot point. (They're not HalfIdenticalTwins, though, even though they can easily pass for each other.)
* VoicesAreMental: When Lia possesses D'Eon's body, the voice coming from his mouth is hers.
* WellIntentionedExtremist: You can't swing a dead cat in this series without hitting a WellIntentionedExtremist. Even the ''heroes'' sometimes engage in extreme behavior in the pursuit of their duties.
* WhereAreTheyNowEpilogue
* WholesomeCrossdresser: D'Eon, however, crossdresses mainly for utilitarian reasons, not because he gets any enjoyment out of it.
* TwoSiblingsInOne: Lia and D'Eon.
* YouAreAlreadyDead: [[spoiler: After being ''stabbed in the bloody chest,'' Robespierre somehow manages to walk around and say goodbye to Robin and D'Eon/Lia before dying.]]
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