Of course, Barbara Gordon, Cassandra Cain and Helena Bertinelli aren't the only women who've put on the Batgirl mask. While she's a relatively minor character, Stephanie Brown nonetheless rose to prominence in the Batman family ranks. She's been her own character before, using the name of Spoiler, and during this period, she had a baby, gave it up for adoption, developed a relationship with Robin, and received special combat training from Cassandra Cain. Later, when the Tim Drake Robin is temporarily retired from his superhero identity, Stephanie creates her own Robin costume and aggressively volunteers to be Batman's sidekick. The Caped Crusader agrees and continues her training…but that doesn't last very long.
Unfortunately for Stephanie, she eventually disobeys orders, ticking Batman off, so he ends up firing her. She then takes the rather drastic step of starting a gang war to prove herself to Batman. Sadly, she's later tortured by the Black Mask and apparently dies with Batman by her side.
But comics being comics, she was later revealed to be alive, and the dead body we saw was actually the corpse of a drug addict. Then, the twists keep on coming. When Batman seemingly dies, Cassandra gives the Batgirl identity to the returned Stephanie. After a touch-and-go first mission, she receives the full blessing from Barbara Gordon and even gets a cool new costume. Stephanie would go on to have many adventures as Batgirl, but after the Flashpoint event resets many aspects of DC's universe, Barbara Gordon would eventually return as everybody's favorite superhero. However, later comics bring Stephanie Brown back in her original Spoiler identity, and she sometimes helps out when Barbara needs backup. After all, Batgirls gotta' stick together.