TV-Series
Description
Mayumi Saegusa, eldest daughter of Japan's influential Ten Master Clan Saegusa family, was born on December 7. She has two older half-brothers and younger twin sisters, Kasumi and Izumi. Standing 155 cm tall, her shorter stature combines with notably long limbs and a proportionally large bust, contributing to her reputation for beauty prior to Miyuki Shiba's enrollment. Her personality blends a graceful, lady-like demeanor with hidden mischievous tendencies, often displaying playful or slightly sadistic behavior like gifting bitter Valentine's chocolates. She exhibits embarrassment when genuinely praised, particularly by Tatsuya Shiba, hinting at deeper emotional vulnerability. Despite her status as a Course 1 student ("Bloom"), she openly criticizes First High School's discrimination against Course 2 students ("Weeds") and actively seeks reform as Student Council President.

A magical prodigy specializing in long-range precision magic, she wields a bracelet-shaped CAD. Her abilities include the innate sensory spell **Multi-Scope** for multi-angle observation beyond obstructions, and combat techniques like **Dry Meteor** (firing supersonic dry ice pellets) and **Multiple Bounce** (kinetic redirection). These skills earn her the epithet "Elven Sniper" and rank her among the world's top tactical magicians. During the Nine Schools Competition, she demonstrates variants such as **Hale Particles** for speed shooting and **Psion Bullet** for precise counter-magic. Her proficiency extends to maintaining her own CAD, receiving technical acknowledgment from Tatsuya.

In the Visitor Arc, Mayumi collaborates with Juumonji Katsuto to investigate vampire-like attacks targeting magicians. Learning the Saegusa family concealed victim information from police, she forms an alliance with Juumonji to bypass political interference. She participates in strategic discussions regarding the paranormal parasites responsible, though direct combat occurs offscreen.

Her relationship with Tatsuya evolves significantly. Initially testing his potential Yotsuba connections via bodyguard Nakura Saburou, she gradually develops romantic feelings, reacting with jealousy when he compliments others. Her father Kouichi exploits this by proposing a marriage alliance to gain influence after Tatsuya's Yotsuba heritage is revealed, though Mayumi remains conflicted due to his engagement to Miyuki. Post-graduation, she undergoes marriage interviews but remains single. At her father's suggestion, she joins Tatsuya's Magian Company under the pretext of gathering intelligence; however, she commits to the organization upon understanding its goals, independent of family ambitions.