In the novel Thrawn: Treason, Krennic sends his subordinate and assistant director, Brierly Ronan, along with Grand Admiral Thrawn, to spy on the Chiss. Ronan also wore a cape because, apparently ...
However, the 2019 novel Star Wars: Thrawn: Treason by author Timothy Zahn did feature a moment between Krennic and Vice Admiral Thrawn right before the events of the Star Wars: Rebels series finale.