Dreyfus was an experienced prefect of several years and oversaw the training and early missions of Cadets and newcomer Prefects. Earlier in his career, he held the rank of Field Prefect, before being later promoted to Senior Prefect.
He used to be romantically involved with Valery Chapelon.
- A Prefect Dreyfus Emergency novel series
- In a 2009 post on his older blog, Alastair Reynolds noted that his mental image of prefect Dreyfus was something akin to Forrest Whittaker's character in the noir film Phone Booth, a middle-aged and somewhat worldweary policeman.