R5-M2 was present inside Echo Base's central hangar, chirping melodiously, when Rebel accessory Han Solo returned from conducting a routine scouting mission of the base's exterior with CommanderLuke Skywalker, in which Skywalker ultimately went missing after falling prey to an ambush from a native wampa ice creature. The droid passed in front of Solo's path as the latter passed through the congested hangar.[4]
During the Battle of Hothdays later, R5-M2 played a small but pivotal role in helping the Rebellion successfully evacuate Echo Base immediately in the face of overwhelming Imperial assault. R5-M2, who was specially programmed to plot sublight tactical courses for space travel,[5] proved extremely valuable[1] by coordinating plans, providing tactical support to Valdez,[6] and planning evacuation routes from the base during the battle.[1]
The astromech droid R5-M2 became but another droid who played an invaluable role in the Rebel Alliance's struggle against the Empire[5] when the Rebellion effectively put R5-M2's special sublight course-plotting programming to good use during the Battle of Hoth. R5-M2 assisted in the Rebel escape from Hoth by planning evacuation routes from Echo Base.[1]
R5-M2's exterior plating included a black head and a blue-and-white color scheme. However, one of R5-M2's forward manipulator arms was missing from its body during its service time at Echo Base.[3]