2-1B (or Too-Onebee) is a medical and surgeon droid that was stationed with the core group of
Rebel Alliance soldiers on
Hoth's
Echo Base. This humanoid mechanical aided
Luke Skywalker twice during the events surrounding the Battle of Hoth. He revived Luke from a state of dormo-shock after the young commander suffered exposure to the Hoth elements. After Luke's confrontation with
Darth Vader on
Bespin, 2-1B affixed Luke with a cybernetic hand. 2-1B was assisted by an
FX-7 droid. 2-1B is a humanoid droid with a skull like head, a transparent trunk, and numerous surgical appendages.