Black Bat is a name used by several unrelated heroes in the DC Universe. The most recognized is Cassandra Cain, previously known as Batgirl. Cain began using the name as an agent of Batman Incorporated in Hong Kong. There was also a vigilante named Sam Braxton who used this alias during the Civil War. In the Amalgam Universe, Barbara Hardy uses the alias as an agent of S.H.I.E.L.D..