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Description
Kojiro is the central protagonist of the story. He is a young warrior and a member of the Fuma ninja clan, a group with a long history dating back to the period when they served the Hojo clan. He is sent by the clan leader to Hakuo Academy in order to counter the influence of the rival Seishikan school and its hired ninja, the Yasha clan. In appearance, Kojiro is a slim and powerfully built young man with brown hair and eyes, and he is noted to be the smallest in stature among the Fuma warriors. He bears a scar over one eye, which gives him a distinctive and somewhat intense look.

At the outset, Kojiro is portrayed as a hot-headed, impulsive, and mischievous youth, with a somewhat lecherous streak and a tendency to act before thinking. As the story progresses and he faces increasingly formidable enemies, he undergoes considerable maturation, developing into a calm, composed, and dependable fighter who thinks more strategically while retaining his core determination and courage. His primary motivation is to protect Hakuo Academy and fulfill his duty to his clan, but he is eventually drawn into a much larger conflict known as the Sacred Sword War, a four-thousand-year-old struggle between the forces of Cosmos and Chaos over ten legendary swords. He is revealed to be the legitimate wielder of the sacred sword Furinkazan, which initially appears to be an ordinary wooden sword but is later shown to be a divine weapon of immense power.

Kojiro’s role in the story evolves from a lone agent sent to handle a school dispute to a key figure in a cosmic war. He begins by fighting the Yasha clan and their powerful ally, the psychic swordsman Musashi Asuka, whom he later allies with in the Sacred Sword War. Within the Fuma clan, he has strong bonds with his comrades, including the clever Ryoma, the illusion-using Kirikaze, and the siblings Kou and Shoryu. He also has a close connection to Ranko Yagyu, who retrieves him for the mission, and he develops a crush on Himeko Hojo, the acting principal of Hakuo Academy. His rivalry and eventual partnership with Musashi Asuka is one of the central relationships of the series.

His development is marked by a transition from reckless immaturity to level-headed maturity as he loses comrades and faces overwhelming odds. He learns to control his temper and fight with greater focus and strategy, becoming a reliable leader among the Cosmos warriors.

Kojiro’s notable abilities include superhuman kinetic vision and reflexes, which allow him to read the movements of the wind and anticipate attacks. He is a master swordsman, originally fighting with a wooden sword. His signature technique is the Fuma Shikyoken, which traps an opponent in a mirror dimension and then shatters it. After claiming the Furinkazan, his power multiplies, and he is able to cut through nearly anything with it. He also develops a degree of psychic sensitivity that connects him to the larger conflict of the sacred swords.