She tucked the papers away, her cap falling back into place and blocking most of her waist from view. Her expression turned shocked when he mentioned who was here. The Joker? She would have to frown at Barbara later for not telling her. But who was his ward? She had been told he didn't remember any of them. "...who?" Dick, Tim? Jason wasn't alive. Dick and Tim weren't here. Limited options.
Turning, she followed him silently, and while she stood on the ledge again, she didn't look down, just looked at him. Even with the mask covering half his face, he still looked younger. He didn't move quite the same way. There were still hints of the same Batman, but he hadn't learned all he would have in her time. It was easy to read him. He said it was strange, but the way he moved said he confused. "You have questions." she said, looking down at the city then. "I'll answer." she paused just for a moment. "Later."
The idea of any of Batman's wards being stuck with the Joker was unnerving. She'd been caught be the Penguin, but she'd escaped, and the Penguin wasn't as clever as the Joker, even if the clown was insane. "Where was he last, and where have you looked?" not that it would matter where he looked, in the end, the Joker could move. But it would still be easier to stay in the same place.
It would be easier to draw him out, and then follow him back, if they could. Someone to get his attention, and then end it from there.