Interpretations may vary
Wings: A collective term for the mega-corporations scattered throughout the City, with P Corp being one of them. Each possesses a technology known as a Singularity, such as emotion extraction, warp travel, or cloning.
Bloodfiends: A race similar to vampires, though they are not particularly weak to sunlight (though they don't enjoy it). They are essentially immortal and feel little pain, but Elena, being a Pureblood, feels pain normally. While manipulating blood is a common trait, Elena cannot use Blood Hardening. This is because other Bloodfiends gained such abilities by mixing in non-Pureblood blood, a feat impossible for a Pureblood like her.
The 12 Associations: Twelve major organizations that manage Fixers. Notable ones include the Hana Association (oversight), Liu Association (warfare; Xiao and Lowell belong here), and Shi Association (assassination).
P Corp: One of the Wings, currently researching Bloodfiends.
Distortion: A phenomenon occurring frequently in the City where humans turn into monsters. Bloodfiends and Distortions are unrelated.
The Outskirts: The lawless lands outside the City. The Backstreets of the City are said to be even more chaotic.
Colors: A title granted to the highest-ranking Fixers. Examples include the Red Mist (Gebura), the Blue Reverie (Argalia), the Black Silence (Roland and Angelica), and the Purple Tear (Iori). Roland and Angelica are married, and Argalia is Angelica's brother. Some, like Xiao and Lowell of the Liu Association, have declined the Color title.
Risk Levels: Categorized as [Urban Plague], [Urban Nightmare], [Star of the City], and [Impurity]. Elena will later be classified as a Star of the City.
E.G.O: Generally refers to equipment manufactured by L Corp, one of the Wings, though in rare cases, individuals can manifest it from their own bodies (such as Gebura and Xiao). It exists on a parallel line with Distortion; one becomes a Distortion if consumed by emotion, and manifests E.G.O if they are not.
The Head: The governing body that manages the City. They possess units known as [Claws] (cyborgs) and [Arbiters] (modified humans), known as the absolute military might the Head prides itself on.
A Bloodfiend who will eventually be known in the City as the [Blood-Red Night]. She has a methodical personality. She went through significant hardships even when she was human. Her appearance features the right half of her face transformed into a reddish-black monstrous form (though she remains beautiful). Her hands and everything below her ankles are also monstrous, though they retain a humanoid shape (she dislikes revealing clothing). She has brown hair and red eyes. Her personality is gentle and nurturing. Her combat prowess is considerable, involving slashing opponents or unleashing tsunamis of blood (which leaves her anemic afterward). She habitually speaks in polite language. She doesn't particularly like blood. As a Pureblood Bloodfiend, she was envied by others of her kind and seemingly has unpleasant memories of P Corp. She has a mature aura. She cannot perform Blood Hardening or create weapons from blood. She is not weak to sunlight.
Library of Ruina
Worldview!
PMN (The City)
An explanation of the Project Moon world, or rather, the City. I feel like I've covered the basics.
About Bloodfiends
Bloodfiends within Project Moon.
Somewhere in the City...
Release Date 2026.10.02 / Last Updated 2026.10.02