The deuteragonist and Arthie's adoptive brother, Jin is a clever and resourceful individual who battles his fear of fire and relies on the support of others to navigate challenges.

The tritagonist and an upper-class Black girl known as Flick, she matures from a forger seeking her mother's approval to an independent person loyal to her chosen family.

A significant antagonist and Arthie's love interest, Laith is driven by vengeance and is characterized by his distinctive white hair and complex relationship with Arthie.

A charismatic vampire painter and Arthie's foil, Matteo is known for his charm and protective nature while hiding his own secrets.

A secondary character and father figure to Arthie, Penn represents vampire interests and struggles with the consequences of his leadership decisions.

The primary antagonist, who also goes by Lady Linden, Flick’s mother, and symbolizes colonial exploitation, serving as a prominent force behind Ettenia's and the EJC's power.