The Sentinel, an ancient construct created by Zuras, resides in planet Arborea’s ruins to empower Zina and Calyssa Aurora, the parthenogenial daughters of the Progenitor Goddess. Tasked with unlocking their Prime forms, it subjects them to transformative trials to awaken their full potential. Though emotionless and robotic, it is deeply loyal to its purpose, adapting its protocols to help the sisters overcome challenges such as Zina’s symbiosis with Nibelung and Calyssa’s curse from Il Dottore.