EG-86 was a masculine EG-series power droid working as a critical information courier for the rebellion. Hera Syndulla, a rebel operative, sent fellow rebels Sabine Wren and Ezra Bridger, along with the droid C1-10P, on a mission to locate EG-86 and bring the droid to the Havoc Outpost; however, their objective was almost foiled by Ketsu Onyo, a bounty hunter attempting to seize the droid for the criminal syndicate known as Black Sun. Ultimately, Onyo experienced a change of heart and assisted the rebels in getting EG-86 to its destination at the Havoc Outpost.
The initial appearance of EG-86 was in the Star Wars Rebels television series, specifically in the episode titled "Blood Sisters," which is the eighth episode of season two.