Born into the Saegusa Family, one of the most politically influential clans in Japan, Mayumi was raised with high expectations and rigorous training in precision magic. Unlike other combat-focused magicians, she specialized in long-range magic attacks, making her a feared opponent in magical duels. Her exceptional talent and intelligence allowed her to rise through the ranks of First High, eventually becoming the Student Council President, where she earned a reputation for her charisma, sharp wit, and teasing personality.

As a high-ranking member of the Saegusa Family, Mayumi is expected to participate in political discussions and clan matters, though she often expresses a desire to live more freely outside of her family’s influence. Despite her noble status and elite upbringing, she does not display arrogance, instead maintaining a playful and sociable nature that allows her to form genuine relationships with her peers.

After graduating from First High, she continues to be a prominent figure in the magical world, assisting her family in political affairs while maintaining her reputation as a formidable sniper magician.

Mayumi is widely regarded as one of the most beautiful students at First High, earning her the nickname “Elven Princess” due to her graceful features and delicate yet powerful presence. She has long, wavy dark brown hair and vivid pink eyes, which are uncommon and striking. Her slender frame and elegant movements give her an ethereal charm, but her mischievous expressions and teasing smirks reveal her playful personality.

She typically wears the First High School uniform, with an added Student Council emblem during her time as President. After graduating, she often dresses in formal attire suitable for her political and family duties, but she still maintains a youthful and stylish appearance.

Mayumi is playful, sharp-witted, and charismatic, making her one of the most sociable and engaging individuals at First High. She enjoys teasing and provoking others, particularly Tatsuya, finding great amusement in his unfazed reactions to her flirtatious and mischievous behavior. Despite her noble status, she is friendly and approachable, often treating people with warmth and humor rather than superiority.

Beneath her lighthearted and playful exterior, Mayumi is highly intelligent and perceptive, capable of analyzing situations with remarkable insight. She possesses a strong strategic mind, allowing her to manipulate conversations and social situations to her advantage. While she enjoys acting carefree, she is fully aware of her responsibilities as a member of the Saegusa Family, and when necessary, she can adopt a serious and commanding demeanor.

Mayumi also struggles with the balance between duty and personal freedom. While she takes pride in her family’s legacy, she sometimes resents the expectations placed on her, longing for a more independent life outside of politics and clan affairs. However, she remains committed to her responsibilities, proving that she is not only a skilled magician but also a capable leader who understands the weight of her position.

• Student Council & Leadership
  As the Student Council President, Mayumi was responsible for maintaining order at First High, especially between Course 1 and Course 2 students. She took a particular interest in Shiba Tatsuya, recognizing his hidden potential and unique skills. Even though she often teased him mercilessly, she also respected his abilities and frequently relied on his talents for school events and competitions.

• Combat & Tournament Participation
  As a skilled sniper magician, Mayumi participated in several magic competitions, proving her exceptional accuracy and long-range combat prowess. Her ability to hit targets with pinpoint precision made her one of the strongest students in First High. She played a crucial role in defending the school against external threats, using her elite-level magic to eliminate enemies from a distance.

• Political Influence & Family Affairs
  After graduating, Mayumi becomes increasingly involved in Saegusa Family matters, often acting as a representative in discussions among the Ten Master Clans. While she prefers to keep a degree of independence, she understands that her role as a political figure is unavoidable. Despite this, she continues to monitor and occasionally interact with Tatsuya, showing that her interest in him has not faded.