Bibliotheca Mystica de Dantalian

Bibliotheca Mystica de Dantalian (or Dantalian no Shoka) is a Light Novel series written by Gakuto Mikumo. It was adapted into manga by Chako Abeno and a Summer 2011 Anime series by Gainax.

Huey, a young ex-pilot, inherited the old mansion of his deceased bibliomanic grandfather and with it the book collection stored in there. However, there was one condition: he also had to inherit the "Bibliotheca."

When he inspects the mansion, Huey discovers a cellar that is filled with piles of books. In the middle of these books he comes across a black-dressed girl who is silently reading a book. She is called Dalian and has a big lock hanging before her. She herself is the gateway to the "Bibliotheca Mystica de Dantalian," which contains the prohibited "Phantom Books."

This series provides the following tropes:
""Who says anything about reading it?""
 * Adventure Duo: Huey and Dalian, Hal and Flamberge, the Professor and Rasiel.
 * Altum Videtur: Libricide. You know what their job is. Also, the OP song.
 * Angst
 * Anti-Hero: Hal. All Libricide Officers are probably similar to him.

""I ask of thee, art thou mankind?"
 * Ars Goetia: The Great Duke Dantalian/Dantalion is the demon of knowledge and is the 71st demon in the listing.
 * Art Shift: Most of episode 9 is drawn in a different style than usual to represent the fact that.
 * Artificial Human:
 * In episode 12, Rasiel refers to Dalian as a "doll" - with strong implications that all three Biblioprincesses are puppets/golems of some kind.
 * Author Existence Failure: In-universe; Leni Lentz dies before he can complete his Crown of the Dog Days trilogy.
 * Badass Abnormal: Huey, just... Huey.
 * Badass Longcoat: Huey.
 * Berserk Button: Dalian has plenty when it concerns books or food. Or Camilla making a joke about Dalian being Huey's "daughter".
 * Beethoven Was an Alien Spy: Episode 12 implies that the Biblioprincesses accompanied many famous historical figures (such as Dalian seen at the side of who is very likely Joan of Arc). It's also implied that the girl trapped in the Black Library is in fact the classical Pandora.
 * Big Eater: When she's not solving mysteries or obsessing over books, Dalian can be quite the eater.
 * Bishonen: Huey.
 * Blood-Splattered Innocents: Estella Lillburn when her butler gets brutally murdered in front of her.
 * Body Horror:
 * Butterfly of Doom: Mentioned as part of the ...incantation... in episode 1.
 * Butterfly of Death and Rebirth: Also mentioned in the same incantation.
 * Chain of Deals: The Book of Exchange enables this. Notably, it starts with a red paper clip (sound familiar?) and ends with Dalian getting a teddy bear she wanted.
 * Childhood Friends: Huey and Camilla.
 * Curtains Match the Window: Dalian.
 * Cute and Psycho:
 * Department of Redundancy Department: Although it can actually not be redundant, since it could say that it's a supposed flying machine that actually works, the newspaper article Ilas discovers as a boy qualifies. It's entitled: A Flying-Machine That Flies.
 * Did Not Get the Girl: When Viola is asked to choose between Armand and his four rivals, she walks over to Armand and.
 * Does This Remind You of Anything?:
 * When Dalian opens up her clothing and Huey uses his key in her lock, red liquid spurts out.
 * The series dispense with subtlety with Flam Berge, it's clearly meant to be an abortion.
 * Elegant Gothic Lolita: Dalian.
 * Equivalent Exchange: Episode 4 and Episode 8.
 * Expressive Hair: Dalian has a tuft of hair that perks up whenever she anticipates eating sugar.
 * Fan Dumb: See the bit about Fan Girl, below.
 * Fan Girl: The first chapter has Dalian gush over "The Castle of Wolves," which she insists is a romance novel and desires to read the last of the trilogy.
 * Fantastic Drug:
 * Relic in Episode 6. It's a failed product which turns out to be heavily addictive.
 * Somewhat Truth in Television, as the effects of Relic closely mimic a real-life drug, PCP.
 * Fix Fic: Dalian's first instinct upon reading the final book in Episode 4 is to write one.
 * For Science!
 * Franchise Zombie: The Light Novel was in danger of becoming one, having already been completed at 8 volumes; however, as the author was preparing a 9th, the editors screwed that over last spring by requesting the series be extended. After months of disagreements, the 9th volume, along with its scheduled OVA, was finally scrapped.
 * Girls with Moustaches: Camilla wears a top hat and fake moustache, and then sticks the latter on Dalian.
 * Golem: One of these guards the Lillburn house. Huey and Dalian have to fight it off.
 * Gratuitous English: Dalian always says yes (and sometimes no).
 * Also, Japanese honorifics are rarely used, instead the characters use their English equivalents like Mister, Lord, and in one case Huey was even corrected to say "Mrs." instead of "Miss."
 * Gratuitous German: Rasiel, her Evil Counterpart, uses ja and nein. She's even used Es ist das Ende (This is the end) once.
 * Hero of Another Story: Hal and Flamberge.
 * Hoist by His Own Petard / Karmic Death:
 * Huge Guy, Tiny Girl: Huey and Dalian.
 * Improbable Weapon User: Fiona fights with perfume. And she's good at it.
 * Invocation:
 * Huge Guy, Tiny Girl: Huey and Dalian.
 * Improbable Weapon User: Fiona fights with perfume. And she's good at it.
 * Invocation:

"Nay, I am the world.""

""Labyrinth of bookcases, warden of 900,000 and 666 sealed Phantom Books, open the gates to wisdom.""
 * I Will Protect Her: Armand, Lord Roskin and the other three rivals vying for heart.
 * Large Ham: The magician in episode 5.
 * Library of Babel: Dantalian's archives, a more magical variety placed in another dimension, it seems.
 * Loony Fan:
 * Mad Scientist's Beautiful Daughter:
 * Marionette Master:, although she's more of a doll master.
 * Mind Screw: Thanks to its mixed up chronology (not to mention that freaky cloud giant) made Episode 11 nearly impossible to follow until the end, and even then it left a lot of questions unanswered.
 * Nice Hat: Dalian when she goes out.
 * Number of the Beast: Dalian's incantation for summoning sealed Phantom Books:


 * Our Homunculi Are Different:
 * Phenotype Stereotype: While there certainly are blondes in Britain, they're not quite as numerous as shown in the anime.
 * Platonic Life Partners: Huey and Dalian are arguably this. In spite of Dalian's Tsundere tendencies, there is nothing remotely romantic about their relationship.
 * Rapunzel Hair: Dalian
 * Raven Hair, Ivory Skin: Dalian with purple hair.
 * Replacement Goldfish: Deconstructed in episode 6.
 * Serious Business: Dalian takes Sweets and books very seriously.
 * Spell Book: 900,666 of them!
 * Spell My Name with an "S": Is it Dalian or Dariane?
 * Stalker with a Crush:
 * Stop Motion: Used in the anime ending
 * Soundtrack Dissonance: The opening a calm operatic piece of music with action sequences overlayed.
 * Sweet Tooth: Dalian. She even gets into a game of Shiritori with sweets in the "On the Next..." for episode 3.
 * Talking Is a Free Action:
 * Even though they're in the middle of combat, Huey can still read out loud some pretty long lines from the Phantom Books.
 * Inverted in episode 6
 * Theme Music Power-Up: Huey recites and weaponizes the opening theme (in Japanese) in the final episode to blow away the advancing zombies.
 * Three Faces of Eve: There are three Biblioprincesses in the anime, and they each represent something.
 * Tsundere / Shana Clone: Dalian has hints of this to Huey.
 * Two Shorts: Episode 3 consists of two separate stories.
 * Verbal Tic: Dalian ends nearly all of her sentences with "-desu"
 * Waistcoat of Style: Huey has one under his coat.
 * X Meets Y:
 * It's Gosick meets the Supernatural starring Cordelia.
 * Possibly with a little Inkheart thrown in for good measure.
 * White-Haired Pretty Girl: Dalian's white-haired counterpart in the archive world, as well as Flamberge.
 * Yaoi Fangirl:.