Empress Zagi

Empress Zagi is an alien empress and owner of Shirakuna. Her first and only appearance is in Gfantis vs THING

Appearance
Empress Zagi resembles a woman in a grey dress. She has black mascara and contact lenses, along with What appears to be a crown on her head.

Gfantis vs THING
Empress Zagi releases Shirakuna onto Japan in the beginning of the film. She later shows up right before Gfantis's death ordering Shirakuna to finish off Gfantis.

Trivia

 * Empress Zagi has a very small amount of screen time for a major character, as she's the one who released Shirakuna in the first place.
 * Empress Zagi's name is a possible reference to Dark Zagi, a Dark Ultra from Ultra N Project, the 2004 Ultraman series.