Growing up in the harsh environment of Gotham City, Selina Kyle was only able to survive on the streets through her seductive charm and skills as a petty thief. Later on into adulthood, she worked in the East End as a hopeless dominatrix, until she saw Batman in his early days fighting crime. Seeing him inspired her to take her thieving skills to a bigger scale by fashioning a costume and calling herself Catwoman. As time passed, she and the Caped Crusader became notable adversaries, but it would also be converted into a sort of relationship, with Batman sometimes saving Catwoman from a villain or both of them working together against said villain. It conflicts with Batman's morals to love a girl that's known for being a criminal. This would end up having Catwoman become more of an antihero as of late, serving as a constant ally to the Bat-Family and other heroes of Gotham.

In the Injustice universe, she originally sided with Batman against Superman's regime. As the High Councilor’s power intensified, however, she joined the regime rather than fight it to protect Batman. Her decision did not sit well with him.

The voice for Catwoman should emulate the performnaces by Grey Delisle in the Arkham and Injustice games. You also have the option to emulate a little bit of Michelle Pfeiffer, Halle Berry, or Anne Hathaway for her Injustice counterpart.