Giganta

Giganta is a fictional character, a red-haired super-villainess appearing in DC Comics publications and related media. A longtime enemy of Wonder Woman and an occasional foil for The Atom, Giganta possesses the superhuman ability to increase her physical size and mass, effectively transforming into a giantess. Her first appearance (Wonder Woman #9, volume 1, published in 1944), written by Wonder Woman creator William Moulton Marston, presents her as a brutish strongwoman with no super powers other than unusual strength. Later adaptations (including appearances on Hanna-Barbera's popular cartoon series Challenge of the Super Friends in the 1970s) introduced Giganta's size-changing ability, a feature of the character which has been retained to date.

Giganta was introduced as a foe of the Golden Age Wonder Woman, first appearing in Wonder Woman #9 (volume 1). In the story, a villainous scientist named Professor Zool artificially evolves an ape named Giganta into a malicious red-haired strongwoman. Giganta is ultimately subdued and captured by Wonder Woman and taken to Paradise Island for rehabilitation. In issue #28, she joins a rebellion of prisoners held on the island, thereby becoming a member of the criminal team Villainy Inc. Giganta is not seen again in the comics until 1966, in Wonder Woman #163 (volume 1), in which her origin is revamped to include another member of Wonder Woman's rogues gallery, Doctor Psycho. This appearance also premiered a short-lived update to her look, giving her waist-length blond hair and an even larger physical stature.[http://www.dcindexes.com/database/story-details.php?storyid=19369]

Giganta is Dr. Doris Zeul, who suffers from a fatal blood disease. She captures Wonder Woman and plans to put her "life-essence" into Wonder Woman's body using an experimental machine. Interrupted by Wonder Girl halfway through the experiment she ends up with her consciousness in a test animal gorilla named Giganta.

Desperate to return her mind to a human body, Zeul the gorilla abducts a comatose circus strongwoman named Olga with size changing abilities through unknown means, though Olga was comatose due to a mysterious shaman) and uses the machine to successfully transfer her mind into that body and keeps the villain name "Giganta".