Kagetora Nagano, also called Nagano Kagetora in Japanese name order, teaches physical education at Tenshou Gakuen while advising both the Japanese Culture Research club and Track-and-Field club.

He displays messy dark red hair cut shorter on the sides and swept rightward, complemented by darker red eyebrows and penetrating dark purple eyes. His typical attire includes a dark gray jacket with blue stripes flanking the zipper.

Disciplined and strict, he enforces proper conduct and order in classrooms. This rigor defines his physical education sessions, frequently deemed "training hell" by students.

His personal interests favor takoyaki and historical subjects. During one documented guard confrontation, he demanded to speak with authority figures.

Etymologically, "Kagetora" merges "kage" (影, shadow) and "tora" (虎, tiger), while "Nagano" combines "naga" (長, long) and "no" (野, field/wilderness).