Deveraux was a mercenary serving aboard the fast cruiser Ariel during the Tau Verde Ring war as part of the Oseran Mercenaries. The crew of the Ariel defected en masse to the then-fictional Dendarii Mercenaries after being captured by Miles Naismith, and Deveraux received the rank of trainee. Deveraux died during the Dendarii operation that captured a Pelian-held rare metals refinery and the Oseran pocket dreadnought Triumph.