Although Grenache was not considered part of the top brass within The Organization, her clearance level was extremely high—at least higher than Rei Furuya's—so she had access to more information than he did.
And because she had undergone brainwashing, Rum did not keep her entirely in the dark about certain matters.
Mao Akai also knew that some of the missions she received were meant to help The Organization grow, while others were meant to satisfy Rum's personal desires.
Chapter 287