Unidentified B1 battle droid (Asajj Ventress)

A B1-Series battle droid was used by the Confederacy of Independent Systems as Asajj Ventress' bodyguard in her journey to Coruscant. At some point during 22 BBY, Asajj Ventress was sent to Coruscant while the political group Bureaucratosis was giving a speech. The droid was provided by the Separatists to accompany her.

On Coruscant, Jedi Grand Master Yoda sensed danger, and found Ventress, and entered a lightsaber duel with her. Meanwhile, a class of Jedi escaped from the Senate Building. Yoda and Clone Commander Cody imprisoned Ventress, but the droid escaped with secret battle plans in a book titled Secret Battle Plans. Later, Commander Cody, Grand Master Yoda and a young Han Solo (posing as "Ian") found and destroyed the droid on Hoth, in the inside of a Tauntaun, retrieving the plans.

Text and facts from the “Unidentified B1 battle droid (Asajj Ventress)” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.