Calintha
They met at the hospital where she went for testing, hearing the sound of his laughter after she'd thought the sound gone from her life. Over time, a friendship builds and she finds a reason to smile again.
When the chaos erupts in the city of Gotham, the only thing she cares about is hearing that laughter again, before it is gone forever. Best to cherish the sounds of her friend's joy while she could. After all, he was put on this Earth to bring joy and laughter. He'd said so himself.