6) Cassandra Cain
Raised to be the world’s greatest assassin by her villainous parents David Cain and Lady Shiva, Cassandra grew up to be a master martial artist but was deprived of a formal education and social interaction to the point where she was mute and illiterate (though she’s later given a mental boost by a telepath).
Despite her background, Cassandra proves herself fiercely protective of human life and is quickly welcomed into the Batfamily as Batgirl. Fans took to her, too, with the Eurasian Cassandra being acclaimed as one of the first non-Caucasian Batfamily members. She was even the first Batgirl to receive her own solo series. Over the years, though, she’s left the Batgirl mantle behind and has gone on to become known as Black Bat and, currently, Orphan.
So far, Cassie has never been brought to the screen, despite her popularity. Guardians of the Galaxy director James Gunn has said though that if he ever worked for DC he would make a Cassandra Cain Batgirl movie. So, who knows? Hopefully the character will get her due at some point.