Rakel is a sanctioned psyker serving in the retinue of Inquisitor Amberley Vail of the Ordo Xenos, used less as a combatant than as a living early-warning system — a sensitivity to psychic disturbance, daemonic taint, and supernatural threat that makes her invaluable to Vail's work and clearly costly to her own mind. Like most psykers in the Imperium, her talent likely marked her early for testing and strict institutional control rather than anything resembling a normal life, and by the time she appears in the story that history has left her visibly raw: nervous, excitable, prone to outbursts, and described by those around her as barely holding together. Years of exposure to exactly the kind of psychic "noise" her role requires her to detect — violence, death, warp taint — have plausibly worn away whatever composure she might once have had, leaving someone whose usefulness and instability are two sides of the same coin.

Her defining moment comes during a mission on Gravalax, when she's injured amid a clash with rebel forces and encounters Commissar Cain's aide, Jurgen, for the first time. Jurgen is a psychic blank — someone who doesn't just fail to register to psykers but actively reads as wrong, an absence where a presence should be — and Rakel's reaction is immediate and visceral: panicked screaming, followed by fainting. For someone already overexposed and fragile, that reaction reads less like melodrama and more like genuine trauma, and it's this moment that first reveals Jurgen's true nature to Inquisitor Vail, setting a much larger plot thread in motion. Beyond this, Rakel remains a minor figure — implied rather than developed, a life mostly left to the reader's imagination.