The Agency: Japan's leading militant force and the organization in charge of civil services. Also known as The Imperial Household Agency, this sinister shadowy syndicate has its talons deep in the flesh of Neo-Edo, and the whole world, for that matter...

The Rebellion: Composed of political dissidents, Yakuza mob bosses and separatists of all stripes, the Rebellion is a loose association that seeks to tumble The Agency from power and reestablish the constitutional monarchy of the emperor and elected Diet.

The Oni: Little is known about the demon world, but rumor has it that the power of their king is waning and infighting is threatening to consume the demon population. Some oni advocate a full-scale war against humans.

Neo-Edo: Formerly known as the city of Tokyo, the capital of Japan has changed a lot over the past forty years in twilight. All play takes place in the city of Neo-Edo or its counterpart in Otokoyo.
        (Places in Neo-Edo)

Otokoyo: The darker side of Neo-Edo's coin, Otokoyo is a city in a slightly skewed plane of existence from the capital city, populated by bloodthirsty oni.
        (Places in Otokoyo)