Zachary Zatara
Zachary Zatara is a fictional character in the DC Universe. Zachary is a descendant of the Homo Magi just like his cousin Zatanna and uncle John Zatara. He first appeared in "Teen Titans (vol. 3)" # 34, and was created by Geoff Johns and Tony Daniel.
Giganta
Giganta is a fictional character 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. 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 which has been retained to date.