Aiko Hatayama is a Japanese high school social studies teacher in her mid-twenties who was transported to the fantasy world of Tortus along with her students. Raised in a rural farming community, she stands 143 cm tall with short brown hair and a youthful appearance that often leads others to mistake her for a student. A childhood experience of being falsely accused of theft and defended by a teacher instilled in her a strong sense of ethics and dedication to student welfare. Initially a staunch pacifist, she resisted exposing her class to violence, but repeated betrayals by some of her students forced her to reconsider. Holding the non-combat Farmer class, her magic specializes in agricultural abilities such as revitalizing soil, accelerating crop growth, and fermentation, earning her the title Goddess of Plenty among the people of Tortus. She creatively weaponized her fertility magic by generating combustible gases to amplify an ally’s dragon breath, destroying the Holy Church’s headquarters and causing mass casualties that left her with lasting remorse. After conquering the Great Barn Labyrinth, she unlocked ancient spirit magic, granting her power over souls, memories, and timed resurrections. Her bond with former student Hajime Nagumo evolved from mentorship to partnership and eventually romance, leading to marriage after their return to Japan. Though appalled by his ruthless pragmatism, she became his moral counterweight. Post-war, she took on the dual responsibilities of rehabilitating returned students and aiding Tortus’s recovery. As a human-apostle hybrid, she gained enhanced physical and magical traits but continued to wrestle with the use of violence, reserving it only to protect those she cherished.