Arthie is an orphan from the colonized country of Ceylan who runs Spindrift, a teahouse that secretly doubles as a bloodhouse for vampires by night. She wields a mystical, shapeshifting pistol named Calibore, which she pulled from a stone. Fiercely protective and calculating, she seeks to protect her chosen family and exact revenge against the Ettenian government for its colonial violence.

Jin is Arthie's adopted brother and her partner in running Spindrift. A survivor of a childhood fire that destroyed his wealthy family, he uses his charisma and quick thinking to move through the dangerous streets of White Roaring. He relies heavily on Arthie for emotional support while struggling to let go of the hope that his biological parents might have survived.

Flick is an upper-class young woman and a highly skilled forger. Adopted by the powerful head of the East Jeevant Company, she longs for her distant mother's affection and approval. Her idealistic nature often conflicts with the harsh realities of White Roaring, but she proves resourceful when recruited to help infiltrate the secretive Athereum.

Laith is a white-haired captain in the Horned Guard who originally hails from Arawiya. Following the tragic loss of his sister, he harbors intense grief and a singular desire for revenge. He approaches Arthie with a plan to steal a damning government ledger, though his true loyalties and motivations remain closely guarded.

Matteo is an elegant, charismatic painter from Velance who frequents Spindrift. As a vampire, he moves through White Roaring society with a mixture of flirtation and sharp observation. Despite his playful demeanor, he holds considerable knowledge about the city's power structures and the inner workings of the exclusive Athereum.

Lady Linden is the powerful and wealthy owner of the East Jeevant Company, which heavily influences Ettenia's economy and colonial expansion. She is a ruthless, calculating business magnate who prioritizes profit and control over personal relationships, maintaining a cold distance from her household and family. Her company's actions directly fund the ongoing exploitation of colonized nations.

Penn is the leader of the Athereum, an exclusive sanctuary for upper-class vampires. Passing as a white Ettenian despite his Arawiyan heritage, he handles the political tensions of White Roaring through legal frameworks rather than outright violence. He seeks to build a formal case against the corrupt forces exploiting his kind.

Elise is a vampire who, alongside her sister, controls physical access to the exclusive Athereum. She strictly inspects incoming guests, ensuring that only those with valid markers enter the high-society sanctuary.

Eleanor is a vampire who handles the mechanical verification of entry markers for the Athereum. Operating from a secure archive room, she monitors the validity of high-society guests and physically secures the records.

Rose is a member of a prominent vampire family in White Roaring. She holds a quiet debt to Jin, who previously helped her protect her brother from forced transformation.

Lambard is a public works official who secretly lives as a vampire. He embezzles government funds to maintain his position and lifestyle, making him a prime target for extortion.

Reni is a vampire employed at Spindrift. He helps maintain the establishment's daytime facade as a legitimate teahouse, ensuring a safe environment for his fellow marginalized citizens.

Chester is a young boy employed at Spindrift. He acts as an informant, lookout, and general assistant for Arthie's illicit operations, using his unassuming age to gather intelligence.

Barclay is a guard stationed at the Athereum who engages in illicit side activities. His compromised position makes him vulnerable to manipulation.

Theo is a former employee of Spindrift who now works as a bouncer for the Athereum. He lost his previous job for forcibly removing the wrong guests.

Sidharth is a glamorous vampire attending the exclusive Athereum auction. He unwittingly holds essential keys needed for the heist.

Raze is a foreman at a local foundry. He holds a bitter grudge against Flick because he was severely punished by the upper class for allowing her to use his equipment in the past.