ASP-38 Droid

"Looks like Vader's personal droid bodyguard is still online. I have a bad feeling about this..." Luke Skywalker during the Battle of Vjun

ASP-38 Droids, also known as Vader Droid, were Darth Vader's security droid's at Bast Castle. After the former Sith Lord's death and redemption at the Battle of Endor, these drois continued to function.