The other protagonist, Edwin is a socially awkward magical theorist and researcher who serves as the Magical Assembly’s liaison to the home office. He struggles with familial emotional abuse and is drawn to Robin despite their differences.

The original holder of Robin’s civil service post, Reggie is tortured by magicians seeking the Last Contract. His death sets the novel’s events in motion, revealing emotional layers for the protagonists.

Robin’s 18-year-old feminist sister, Maud is resourceful and countercultural, supporting her brother in resolving their family affairs while seeking independence and education at Newnham College.

A secretary in the Home Office assigned to support Robin and Edwin, Adelaide balances workplace challenges with offering valuable insights and help to the protagonists.

Reggie Gatling’s great-aunt and a keeper of the Last Contract, Flora uses her powerful self-taught magic and secrecy to protect her family’s legacy.

A son of an earl who lost his magic in a family tragedy, Hawthorn interacts with Robin and Edwin during their search for insights about a curse. He is noted for his cruel demeanor and muscular appearance.

Part of Edwin’s social circle and involved in a conspiracy to exploit the Last Contract, Billy’s outward cheer contrasts his deeper desires for magic and power, leading to pivotal conflict.

Edwin's older brother and a powerful magician, Walt embodies the dominating, violent masculinity that traumatized Edwin, positioning him as an antagonist in the narrative.