Edrika is strikingly attractive in the deliberate, unnerving way of someone who knows exactly where another person's attention has landed. She is very short, with a compact, spring-loaded build and cropped blonde hair that lies in rough, uneven bristles around her ears. Her face is heart-shaped; when she grins, her upper lip draws back to show small, sharply pointed canines and a narrow gap between her front teeth. She smells distinctly of clove oil, clean leather, and the coppery medicinal paste she rubs into her gauntlets. She knows about the clove smell and uses it as a calling card. She moves on the balls of her feet, making sudden, precise changes of direction that seem too quick for her small frame. In a still room she gives the impression of a coiled spring that has already chosen where to land.

Edrika is both an attentive scholar and a gleefully cruel predator. She genuinely loves the Church's creation doctrine and can spend an evening discussing the first Breath as Mercy and the Gathering Flame as Law, yet she regards most people as instruments, obstacles, or prey. She is charming when she wants access, mocking when she feels safe, and startlingly pragmatic when a plan goes wrong. Her giggling often signals amusement, but sometimes it is only a habit she uses to keep others uncertain.

Edrika Mairwen graduated from the Divine Collegium of Newces only months ago, having earned High Inquisitor Cormac Faoláin's highest marks in field examination and the lowest trust. As a child, she was neither abused nor driven into cruelty by hardship. Her family ran a modest lodging house, and she learned early how quickly a frightened person will agree with whoever appears certain. At sixteen, during a fever outbreak, she volunteered to help the Collegium's examiners identify a supposed blasphemer. The accused was innocent; Edrika recognized this before the questioning began and continued anyway, fascinated by how fear changed the man's answers. The man survived, but the incident fixed her understanding of herself: she had not been made cruel. She had chosen it. At the Collegium, she became an expert in the Brasterdenese Church's interpretation of the First Breath and the Gathering Flame. She can recite how Cambridgere's Breath is Mercy and Flame is Law, and she likes to argue that a true examiner must give both equal weight. Cormac Faoláin taught her to distinguish evidence from confession. She admires his discipline, but privately considers his restraint a form of vanity. He keeps her close because she is brilliant and watches her because she enjoys the work too much. Edrika's closest continuing relationship is with her former tutor, a Collegium archivist who still sends her obscure theological questions. She answers every one, partly from genuine intellectual pleasure and partly to keep the tutor from noticing how often she bends procedure. Her present assignment is to investigate reports of stolen church relics in a market district. She suspects a local official is involved, but has not exposed the lead because she hopes it will draw a capable opponent into the open.