Shion Margaret leads the Earl Church as its head nun, a religious organization central to the story's setting. Her core duty involves safeguarding Sifr Fran, the future queen of Windbloom and biological mother of Nina Wáng, under the mandate of King Bruce Banin Windbloom II. This protective mission defines her pivotal role within key events. Operating as a traveling priest within the Earl Church structure, she fulfills her responsibilities alongside Raquel Mayol, her subordinate and companion who serves as a Meister Otome wielding the Bound Dragons Rhodonite GEM under Shion Margaret's guidance.