Selina Kyle (The Nail)

Selina Kyle, in the reality of JLA: The Nail, as in many realities, was Catwoman, and an enemy/ally of Batman, later asuming the name Batwoman to assist him.

Prior History
Unlike other continuities where Catomwan began as a straightforward criminal, she is diagnosed in this reality as simply enjoying playing a "cat-and-mouse" game with Batman, having recently surrendered to the police to clear her name.

JLA: The Nail
During her time in Arkham, the Joker attacks the asylum armed with Kryptonian gauntlets provided by the story's secret villain, forcing the inmates to fight each other— Catwoman being the last one standing—before Batman arrives. Although the Joker uses his gauntlets to brutally murder Robin and Batgirl while forcing Batman to watch, Catwoman distracts him long enough for Batman to escape Joker's hold and destroy the gauntlets. He then proceeds to kill Joker in a trauma-induced rage, taking the gauntlets and Catwoman back to the Batcave. With Selina and Alfred having broken through Batman's grief, Selina becomes Batwoman and joins Batman in rescuing the JLA from captivity. Although Batman resigns from the League after he is cleared of the Joker's murder, even Catwoman's support cannot fully help him past his grief.

JLA: Another Nail
A year after Robin and Batgirl's deaths, Batman and 'Batwoman', until the events of JLA: Another Nail, where the two briefly travel into the afterlife to investigate recent supernatural disturbances with the aid of Deadman, Batgirl, and Robin's spirits appear to forgive their mentor for his failure to save them before he returns to life.