Welcome to the 21st Century AD, where the megalopolis of Arkham City exists. Placeholder.

Arkham City Citizens

The City that Never Sleeps. Lest the Nightmares come.

Arkham City, the home and headquarters of the Hadou Financial Group as well as the location of the Miskatonic University. Arkham City is also the territory of a criminal organization known as the Black Lodge, which has access to an array of giant mecha as well as a number of powerful sorcerers that make it difficult for law enforcement to effectively combat. A separate portion of the story is set in the coastal town of Innsmouth and one of the climactic battles takes place over the sunken city of R'lyeh. The town of Dunwich is also referenced.
A center of both industry and eldritch lore, it is home to Miskatonic University (not that one either), which Kurou is a former student of. The city was built up and is run by an industry group and family dynasty known as the Hadou Financial Group, led by Ruri Hadou, who works to protect the city from the forces of darkness.

Kurou Daidouji	Al-Azif The Necronomicon	Al-Azif Battle Form	Metatron Hero of Arkham City	Leica

Alison	Colin	George	Officer Stone	Officer Ness

Laban Shrewbury	Hazuki Celaneo Fragments	Ennea	Nya	Azrad Deceased.

Professor Armitage

Hadou Group

The most powerful company in Arkham City. And possibly the world.

The 16-year-old head of the Hadou Financial Group, Ruri wields considerable power in Arkham City. After her parents were assassinated by agents of the Black Lodge, she was taken care of by her grandfather, Kouzou Hadou (覇道鋼造, Hadō Kōzō). She cared deeply for him and sought to live up to his legacy by piloting Demonbane in battle. To this end, she employs Kurou to search for a suitable grimoire, but circumstances place the controls in his hands instead. Though she is initially bitter that someone outside the Hadou Group is piloting her grandfather's legacy, she swallows her pride and directs Demonbane's support crew from an underground command center.
In her own route, Ruri comes to depend on Kurou more as time goes on and eventually realises that her resentment is unwarranted, given that she is not suited to front line combat. After he is injured defending Arkham's underground shelters from the Black Lodge, Ruri makes a contract with Al and attempts to fight in his stead. Although she is still no match for the Anticross, she is instrumental in resuscitating Kurou and tipping the balance of the battle. Before Kurou pursues Master Therion, she confesses her love and promises to wait for him to return, though for a whole year there is no news. Unbeknownst to her, Kurou is defeated when Nyarlathotep is able to exploit Al's growing jealousy to distract her at a critical moment. Al is still able to cross time in order to give word of his last moments to Ruri, but she refuses to accept defeat and renews her contract, which draws her through dimensions to the scene of the final battle. With her help, Kurou is able to defeat Master Therion and restore the timeline to its proper state. Since the Black Lodge is erased from history, Ruri loses her memories of the story. She decides to attend Miskatonic University and ends up meeting Kurou again, while Al watches on, accepting that she cannot be together with him.
Ruri generally coordinates the efforts of Demonbane's support team, consisting of her personal maids, Makoto, Sonia and Chiaki, from their secret underground base. As the head of the Hadou Financial Group she possesses excellent leadership and organisational skills. When she makes a contract with Al, she gains the ability to transform into a magius and has all the same abilities as Kurou, though she has no combat experience. Ruri proves unable to wield the Scimitar of Barzai with one hand, for instance, and generally uses either Cthugha or Ithaqua but not both. She is also capable of piloting Demonbane.

Ruri Hadou	Winfield	Makoto	Sonya	Chiaki

Black Lodge

The Black Lodge is a crime syndicate whose goals is to bring chaos into Arkham City and the world. They are the main antagonists of the visual novel series Demonbane.

Master Therion	Etheldreda Pnakotic Manuscripts	Doctor West	Elsa	Sandalphon

R'Lyeh Text

Anti-Cross

This is a meeting place *cum* throne room.

Anticross (逆十字Anchikurosu?) is the seven powerful sorcerers of the Black Lodge, they answer directly to Master Therion, but are not above achieving their personal goals. Each of their names is taken from emperors of the Ancient Roman Empire.

Augustus	Vespasianus	Caligula	Claudius	Tiberius

Titus	Nero

Grimoire Girls

A grimoire (/ɡrɪmˈwɑːr/ grim-WAHR) (also known as a "book of spells") is a textbook of magic, typically including instructions on how to create magical objects like talismans and amulets, how to perform magical spells, charms and divination, and how to summon or invoke supernatural entities such as angels, spirits, deities and demons.[1] In many cases, the books themselves are believed to be imbued with magical powers, although in many cultures, other sacred texts that are not grimoires (such as the Bible) have been believed to have supernatural properties intrinsically. The only contents found in a grimoire would be information on spells, rituals, the preparation of magical tools, and lists of ingredients and their magical correspondence.[2][unreliable source?] In this manner, while all books on magic could be thought of as grimoires, not all magical books should be thought of as grimoires.
While the term grimoire is originally European and many Europeans throughout history, particularly ceremonial magicians and cunning folk, have used grimoires, the historian Owen Davies noted that similar books can be found all across the world, ranging from Jamaica to Sumatra.[4] He also noted that in this sense, the world's first grimoires were created in Europe and the Ancient Near East.