London

is the capital city of the United Kingdom.

Overview
Uniquely, London is divided into two "sides", completely separate from each other and unable to be traveled between by conventional means; instead, people must use the or the Coin Gate to move from one side to the other. Consequently, while the residents of Reverse London are fully aware of Front London, the residents of Front London largely believe Reverse London to be a myth. Additionally, Front and Reverse London share identical geography and architecture, with buildings being present in the same location in both cities; consequently, if a building is destroyed in Reverse London, its counterpart in Front London will also be destroyed.

London has multiple different news organizations: one of these, the, also publishes articles on events and people in Reverse London that can be read by transforming its newspapers into the with a , which is applied to the organization's symbol on the top right-hand corner of the front cover; one of these articles is the , which focuses on the most active Wing Bind member of the day and occasionally reaches the front page of the newspaper if the story involved is popular enough. There is also an organization known as that focuses primarily on celebrity gossip and scandals, like those of Ninny Spangcole, whom they feature in their articles roughly three times per week; due to their tendency to twist words and manufacture conflicts in their reporting, they are looked down upon by other news outlets.

Front London
is the side of London inhabited by normal Humans and located in the Human World. It contains hundreds of buildings built in a modern brickwork style, including clock towers and ornate churches, as well as large palaces. The streets are rather narrow, with several back alleys, but are adorned with trees. It also contains classical phone booths. Normally, residents of Front London are unable to see Dragons and thus cannot protect themselves from these creatures; however, Balgo Parks gained the ability to do so after living with Shelby for 10 years and later being bitten by him. In the 1800s, London drastically cleaned up its streets, indirectly reducing the population of Disguiser Dragons by removing many of the corpses they could have inhabited.

Reverse London
is the city that spans across the "hidden side" of London. Because its citizens can see Dragons, they have taken up the duty of controlling and protecting Dragons. The architecture and layout of the central city in Reverse London is similar to that of Front London, and it contains modern technology such as digital monitors and escalators. However, Reverse London also contains large swaths of farmland and nature, in contrast to Front London's entirely urban layout; this is used at least in part for Dragons to live in for domestication purposes. The residents of Reverse London make use of the Dragons they protect to produce resources like food and minerals for use in their everyday lives. In the year 1609, Wing Bind issued the, prohibiting citizens of Reverse London from making contact with Dragons on penalty of a 100 year prison sentence or execution.

Standard procedure when a Dragon attacks in Reverse London is to cordon off the area with while a member of Wing Bind handles the situation. However, if a Dark Dragon appears, Wing Bind must call in an emergency blockade on the relevant street, resulting in the sign flipping to display this status while nearby citizens are instructed through their phones to take shelter in designated areas until the Dark Dragon is disposed of. By contrast, if a normal Human commits an act of violence or terrorism, Wing Bind does not intervene and instead lets the police respond.

Reverse London is comprised of dozens of different streets, such as, , , and. It is also divided into four general districts, one for each cardinal direction.

Dragons
are supernatural beings exclusive to London. Centuries ago, they were responsible for 72% of all deaths in London, which led to the residents of Reverse London establishing Wing Bind in order to protect, control, and in some cases exterminate them. There are almost two dozen different known species of Dragon, each varying in size, appearance, temperament, physical qualities, and intelligence levels.

West Branch
Reverse London contains the. Unlike its eastern counterpart's role of managing the flow of souls between worlds and purifying Hollows, the West Branch focuses on protecting and domesticating Dragons, specifically with its version of the Gotei 13, Wing Bind.