Mallon is a teacher at the Magic Academy who has fully embraced the identity of a magical girl. Inspired by magical girl anime from a young age, she trained intensively and eventually became a real magical girl, after which she was appointed as a faculty member. She has a youthful appearance that contrasts with her considerable knowledge and experience, leading others to frequently doubt her claim of being seventeen years old. Her demeanor is energetic, enthusiastic, and somewhat childlike, but she is serious about her responsibilities as an educator and as a magical defender.

In the story of Quiz Magic Academy: The Original Animation 2, the academy falls to the ground after the destruction of its floating device, inadvertently breaking a seal and releasing a horde of demons into the surrounding forest. As a teacher, Mallon plays a supporting role in the events that unfold, likely offering guidance and magical assistance to the students as they confront the crisis. She carries a wand known as the Maronbo, which she uses for both teaching and combat.

Mallon is well-liked on campus and has her own fan club, which includes other faculty members such as Garuda and Romanov. She maintains friendly relationships with her fellow teachers and interacts with students in a warm, encouraging manner. While her magical abilities are typical of a magical girl—including the use of her wand for attacks and transformations—she is also deeply knowledgeable about anime and games, which she teaches as her academic specialty. Her development is not heavily explored in the OVA itself, but her consistent presence across the series highlights her as a dedicated, quirky, and ultimately reliable member of the academy staff.