R2-B1 was an R2 series astromech droid who served on the royal cruiser belonging to Queen Amidala. During the blockade of Naboo and the subsequent heroic escape, the ship carrying Queen Amidala was hit by enemy fire and damaged. The droids stored on board were sent out to repair the damage, R2-B1 was one of the droids destroyed in this event. Only R2-D2 survived to restore shield power to the cruiser.
- Star Wars: Episode I The Phantom Menace (First appearance)