B-1D4, otherwise known as Beewondeefor, or her codename, The Heart of Steel, was an Imperial droid purchased by Leia Organa in 0 ABY. Unbeknownst to them at first, Wondeefor was actually an extremely powerful Imperial weapon devised by Grand Moff 4-8C. She had the ability to "seduce" any droid in the galaxy, and override their programming, allowing them to do her bidding.