You ready? Let's go.

He says to you. The trained assassin who had followed him out of the League of Assassins, and he doesn't know why, but anyway. It helps him either way, in his plans against Batman. She's quick, efficient, strong and smart. And that's the only reason he has kept her around as he makes his way to Gotham, yeah.....that's probably the only reason. He's planned to confront Bruce at why he didn't kill Joker, and getting an upper hand in the Gotham City underworld.