Mana Tatsumiya serves as the eighteenth student in Class 2/3-A at Mahora Academy and the daughter-priestess of Tatsumiya Shrine on campus, practicing exorcism with pre-existing magical knowledge before Negi Springfield's arrival. Her reserved, antisocial nature leads her to avoid conversations and social engagements. She possesses mixed Puerto Rican and Japanese heritage, with her name alternatively read as Ryū-gū Mana using identical kanji. Physically towering at 184 cm—the tallest girl in her class—she has an olive complexion, black hair, hazel eyes, and measurements of 89-69-88 cm, ranking third in bust size. Born November 17, 1988, she participates in the Biathlon Club and harbors feelings for its captain, who resembles her deceased former pactio contractor. Professionally, she operates as a mercenary accepting high-paying contracts, specializing in demon hunting, exorcism, or ghost elimination. She employs firearms with spellbreaker bullets, maintains extreme frugality, and adopts a cold-hearted, focused demeanor during missions. Her half-demonfolk heritage grants a Demon Eye for spirit detection, enhanced physicality enabling multi-story leaps, and an extended lifespan keeping her active into the 22nd century. She wields exceptional marksmanship with guns, rifles, and projectile weapons—including coin-based Rakansen techniques—and accesses an alternate-dimensional storage space (Ikuudansou) for armaments. Key involvements include uncovering Negi’s magic during Konoka’s Kyoto rescue, accepting Chao Lingshen’s contract to disrupt the Mahora Festival by preventing confessions and clashing with Kaede Nagase in a sniper duel. At Gravekeeper’s Palace, she revealed time-dilation bullets and her demon lineage while fighting Zazie Rainyday’s sister. She joined the Ostia expedition, exposing Shiori’s impersonation of Asuna and aiding against the Mage of the Beginning. Long-term, she participated in the 22nd-century Martian War of Independence—delaying Asuna Kagurazaka’s awakening—and served as temporary headmaster of Amano-Mihashira Academy City, advising Touta Konoe during the Mahora Martial Arts Tournament. Her unchanging appearance across decades confirms her longevity. Alternate portrayals include the first Negima! anime depicting her with darker skin, blue hair, and a pactio artifact rifle firing magic bullets. The Negima!? adaptation highlighted her detachment, weapon maintenance routines, and a temporary bear transformation incident, preserving her core traits.