Petrifia

Petrifia is a affiliated with the, and is responsible for spearheading a large number of projects that have increased the Marines' firepower in recent years. Although, Petrifia's overall personality has made her extraordinarily difficult to deal with by other scientists and Marines, meaning she mostly works alone in gathering samples and performing experiments, leading the results of her experiments to be delayed significantly. Despite these delays, the quality of her work is undeniable, leading the woman to be praised as the "Waiting Witch" (待ち魔女, Machi Majo).

Due to the vast majority of her test subjects being unwilling who have come to be defeated by her, Petrifia's name among the Marines' enemies is feared. Many among them have labelled Petrifia as "Gorgon" (ゴルゴン, Gorugon), for their slow defeat feels as if they are being turned to stone by her gaze.