Carly is Kirk Langstrom's niece.
History[]
In The Man Who Would Be Bat, Kirk Langstrom stated that his research on bats is because of Carly, as he wants to cure her deafness. This caused Bruce to go to her house to give her a gift. He ultimately discovers she can hear. Langstrom then reveals that his research was to turn him into a gigantic bat, as he wanted to be feared like Batman.
She later made a cameo in the birthday party hosted by Arnold Wesker in A Fistful of Felt.