An independent mercenary who arrived on Rubicon around the time that the Coral response was rediscovered. Held to be a member of Branch, a hacktivist collective active in the Rubicon system, Chartreuse is said to have dealt a critical blow to the Closure System during the plot to attack Station 31. Branch is made up of a rotating group of four people, and Chartreuse is believed to be the second-oldest of the current roster.