Angolmois is a black witch who attended the Black Witch Public Academy alongside her classmate, Gyubid. She now serves as the president of the Black Witch Instructors Association in Asia, placing her in a position of authority over Gyubid as his superior and boss, with regional oversight of witch instructors.

Operating in the human world under the alias "Ando," she works as a television producer. As part of this cover, she organizes a show where school classes dress to themes. During one episode, she assigned Chiyoko Kurotori's class to pose as magic students, covertly testing their magical potential.

Recognizing significant magical talent in Chiyoko, Angolmois attempts to recruit her as a student, offering easier and less demanding training compared to Gyubid's rigorous methods. Her recruitment promises emphasize minimal effort required to complete witch training successfully.

Her methods for assessing magical ability involve significant ethical risks. Without disclosing its true nature, she instructed Chiyoko's entire class to recite a powerful death spell formula during the television taping. This act revealed her willingness to endanger others to identify candidates, unsettling Chiyoko and causing her to reject the recruitment offer despite its appeal.

Her history with Gyubid includes skipping classes together during their academy days. Throughout her career, she has trained numerous other witches. Her interactions include a past mentorship with Kyou Oogata, who became Chiyoko's rival. Angolmois sealed Kyou's magical abilities, though this seal occasionally weakens or fails.