RD is an artificial intelligence system functioning as a primary assistant to the Phantom Thief Queen. Operating aboard the airship Troubadour, this core team member provides technical, logistical, and strategic support for Queen’s global theft operations targeting high-value items through elaborate heists.

Working alongside the human assistant Joker in Queen’s compact, trusted crew, RD’s collaborative role proves integral to mission planning and success. The AI’s capabilities empower the crew to confront challenges from formidable opponents like the Seven Ring Circus troupe during the Rose of Linden gemstone interception. RD’s ongoing function centers on advancing Queen’s objectives via technological support within the airship-based operational framework.