R-K77 was one of New Republic Chancellor Mon Mothma's protocol droids who served in her office on the planet Chandrila. In 5 ABY, in the aftermath of the Galactic Empire's attack on Mon Mothma and other New Republic leaders during the Republic's Liberation Day festivities, R-K77 relayed an urgent meeting request from Senator Leia Organa to the Chancellor. When R-K77 informed Mothma that Senator Organa had said the meeting was a code K-one-zero, a code used by the Rebel Alliance which meant "disengage and regroup," the Chancellor asked the droid to inform Organa that she was on her way.
R-K77's metal face was coated in white matte enamel, and it spoke with a crisp Chandrilan accent.
R-K77 appeared in Chuck Wendig's 2017 novel Aftermath: Empire's End.
R-K77 appeared in Chuck Wendig's 2017 novel Aftermath: Empire's End.