Talia taught Catwoman a meditation technique so that any sort of mind-control, such as Ivy's spores, will not affect her. When Poison Ivy uses a truth serum powder derived from plants, Catwoman reveals that she cannot because Talia, Ra's al Ghul's daughter and leader of the League of Assassins, used mind control techniques to prevent Catwoman from ever forcefully revealing his identity as Bruce Wayne. Catwoman discovers Harley Quinn is also living with them, and proposes that the three women join together to protect one another as a team, but first Harley Quinn and Poison Ivy want to know who Batman really is. However, Poison Ivy arrives to save Catwoman and offers her to return to her new hideout, which is actually the hideout of the Riddler, whom Poison Ivy has seduced and drugged. When Catwoman fights a new villain named 'Boneblaster', it is revealed she still has physical limitations from her ordeal in 'Heart of Hush' and is nearly easily beaten by the two-bit thug. Bruce Wayne is thought to be dead and is replaced by Dick Grayson. Catwoman gets her revenge by stealing all of Hush's money and giving it to Gotham City's female criminals, Harley Quinn and Poison Ivy, as well as Holly Robinson. Shortly after the events of the Heart of Hush, Batman R.I.P., Final Crisis, and Battle for the Cowl storylines, Hush cuts out Catwoman's heart, Batman retrieves it, and Zatanna heals her. The first issue of the series was released in June 2009, as a part of the Batman: Reborn relaunch of DC's entire line of comic book titles featuring the superhero Batman.

The term Gotham City Sirens refers to three of the most popular female villains inhabiting Gotham City: Catwoman, Harley Quinn, and Poison Ivy. Gotham City Sirens is an American comic book series that was written by Paul Dini with art by Guillem March and published by DC Comics. Cover of Gotham City Sirens #1 (August 2009), art by Guillem March.

Gotham city sirens paul dini