An R1-series astromech droid known as Endee existed on the planet of Mon Cala during the Galactic Empire's reign, specifically one year after its inception. When Jedi Padawan Ferren Barr informed his fellow rebels about Darth Vader's arrival on Mon Cala, he requested that Endee show files ranging from four-three-oh to four-five-nine, which held details regarding Darth Sidious, Order 66, Skywalker, Maul, Darth Plagueis, Darth Tyranus, Jar Jar Binks, Padmé Amidala, Sifo-Dyas, and Kamino.
Following Lee-Char's torture at the hands of the Ninth Sister in an attempt to discover Ferren Barr's location, Lee-Char got in touch with Barr to warn him about the impending arrival of Vader and the Inquisitors. Barr then gave the order for an evacuation to commence, and he instructed Endee to initiate self-destruction once Farr and his followers had departed.
Endee's initial appearance was in the canon comic book Darth Vader (2017) 14, with the writing attributed to Charles Soule and the pencil work done by Giuseppe Camuncoli.