Jenna Duffy was a pickpocket and con artist operating out of Keystone City who moved to Gotham when she attracted unwanted police attention. Eventually, she was enlisted by Tweedledum and Tweedledee to serve as the "Carpenter" for their new Wonderland Gang.

As part of the Wonderland Gang, she participated on a bank robbery and fought against Robin, who defeated her with no trouble. After this, Duffy and the gang were arrested by the GCPD.[1]

Duffy left active villainy in favour of working as an actual carpenter for the Broker, building villain lairs. She was employed in this capacity by the Director, however when he tried to use her as a guinea pig for his deathtraps, she assisted Batman in stopping him.