Ran Edge=Wems, also known as Ran Edge Wems or Associate Professor Wems, serves as a homeroom teacher at Sosei Academy. She possesses distinctive red hair styled in a bun with a side tail, pale skin, pointed ears, and amber-colored tareme eyes. Her professional attire consistently includes a blazer, shirt, trousers, a decorative belt, a headscarf, and a pendant necklace.

Operating within Sosei Academy's environment of social divisions between the elite female Flawless department and the coeducational Slightly department, she works amidst supernatural occurrences involving the Tayutai race. Her role places her in proximity to main characters such as Yuri Mito and Mashiro, though her direct involvement in their conflicts with the Tayutai or the "Three Mightiest" remains undefined.

Across all documented media, including the original visual novel, its sequels, and the anime adaptation, she is consistently presented as a secondary figure. Her interactions occur strictly within her academic capacity as an educator, distinct from the central romantic or action-oriented plotlines focused on the protagonists' efforts to bridge human-Tayutai relations.