Born on Paradise Island to a race of Amazon Warriors; Diana is a princess, an ambassador and a warrior. Using her powers granted by the Gods of Olympus upon her birth, Wonder Woman came to America to fight for peace, justice and truth. Wonder Woman is Earth's greatest heroine.
Catwoman, the costumed alias persona of Selina Kyle, is a mostly reformed cat burglar with an on-again, off-again, romantic relationship with Batman. She is shown as a woman who is very strong-willed, independent, and morally conflicted with her past.
Among the many incarnations of Supergirl, the most prominent as well as current is the "Girl of Steel" Kara Zor-El, Superman's cousin and last survivor of Krypton's Argo City. In the new 52, Supergirl have a more brash and defiant personality in response to the destruction of Krypton.
Power Girl is a Kryptonian, a member of the Justice Society of America and one of the few survivors from Earth-Two after the Crisis on Infinite Earths. Although she goes by Karen Starr, her name is actually Kara Zor-L. She is Earth-Two's version of Supergirl.
Formerly Princess Koriand'r of the now-destroyed planet Tamaran, Starfire found a new home on Earth, and a new family in the Teen Titans. She has also served with the Outsiders, Justice League, R.E.B.E.L.S. and is currently associated with the Outlaws.
Helena Bertinelli, born into one of Gotham's mafia families, became a violent vigilante destroying those that had killed her family. Though she has come more closely in line with other superheroes (after joining the Birds of Prey for instance) her methods are still harsher than most.
Batgirl has been the alias of several different crime fighters, all of them having connections to Batman. The original "Bat-girl" was Bette Kane, then Barbara Gordon, followed by Helena Bertinelli, Cassandra Cain and Stephanie Brown. The current Batgirl is Barbara Gordon.
Beatriz Bonilla da Costa had originally been bequeathed with her powers due to Brazilian mysticism. She was the President of Wayne Enterprises' Brazilian Branch. She has served as a member of various teams, but Fire is most well known for her team-ups with her best friend Ice.
After being dismissed from the military for being a lesbian, Kate Kane would live a directionless party-girl heiress life, until a chance encounter with Batman on a dark night, inspired her to find a new calling in life, later adopting the mantle of Batwoman.
Cassandra Sandsmark is the daughter of Olympian god Zeus and Dr. Helena Sandsmark. She became the second Wonder Girl in an attempt to save Wonder Woman's life. Cassie continues adventuring as a member of the Teen Titans.
The Empress of Almerac chose Superman as a mate, but became his enemy initially when her first advances were unsuccessful. While attempting to protect the Earth from the destructive beams of Brainiac 13's Warworld by using her warship as a shield, her ship exploded. Maxima has not been seen since.