Jagger & Jones is a prestigious design agency headquartered in New York City. It was founded by Trevor Jagger and Angie Jones. The agency was hired by Darius to help design DERE EVIL.EXE. There was animosity, however, when Darius discovered that Jagger had modified a prototype of the game for his own purposes.

Jagger & Jones is mentioned briefly by Lilith's brother in The Last Yandere. It is also the focus of Design Hero, a visual novel developed by Akinaba Games, in which the player character is hired by Trevor Jagger as an intern for the agency.