DC Database

Christy Xanadu was one of three women who masqueraded as the Joker.

Christy Xanadu, who also goes by the title Madame Xanadu, is a millionaire who owned the Madame Xanadu V-R Arcade in New Atlantis. Xanadu secretly worked with Lori Lemaris and Mary Marvel in sharing the heroic masquerading identity of the Joker. Xanadu used her fortune to finance equipment and technology for the Joker alias.

When Superman was imposing his oppressive totalitarian rule over Earth he discovered the identities of the Joker by psychically interrogating and then executing Mary Marvel. He then had Lemaris imprisoned for a decade. Xanadu's actual fate, however, remains unknown.