Her annoyance at Supergirl's outburst was apparent. It wouldn't go over well with Bats if she couldn't even keep her friends under control on a simple mission like this, which as expected, really turned out to be a test. "Bye KF... See you later." When Batman showed up, she already knew she would be having to leave, and probably hear it later, but at least she took the mission somewhat seriously. More so than the others. Even though she kind of felt it was wrong, she wished the other two hadn't shown up, even KF, really. It was true the two could've managed it easily, they worked brilliantly as a duo (which Batman, she was aware, had taken note of) even if they weren't incredibly serious. That wasn't really the main problem here; Robin worked fine in a duo, she had been in one her whole life. But with a team? No. Co-operation with one person was difficult enough as it was.
"It wasn't my fault." She crossed her arms as they left the room, following behind him with crossed arms. "Me and KF were going to deal with it, and then Clarence and Supergirl showed up, and... yeah." Not thinking of a better argument, and deciding to give it up now, she climbed onto the windowsill of where she expected Batman had entered, and soared out onto the ground, using her tools to land safely on her feet.