Giganta

Giganta is a character from Justice League and is a minor antagonist in Knights of the Multiverse Season 2. As her name implies, she can change her size at will and she works with many other supervillains and criminals in the Secret Society, and was a part of those that joined up with the Glemy Faction in a bid to conquer the known Multiverse.

Personality
Despite her size and strength, Giganta is extremely feminine, even delicate sometimes, but is still eager for battle, though isn't as likely to get into a fight if her chances of winning are looking bad.

Skills & Powers
Normally standing somewhere over six feet tall, Giganta can greatly increase her size, becoming gigantic, and proportionately strong and heavy. In her enlarged state, her strength is nearly a match for powerhouses like Wonder Woman.
 * Size-Changing

Hiroshi Shiba
Though not exactly like her own powers, Giganta and Hiroshi Shiba/Jeeg formed a fierce rivalry in the second season.