Being the sole heir to the Kusanagi Clan, Kyo is able to summon crimson flames. Many of his special moves use this ability, such as his "Oniyaki" move. To make this possible, he wears special gloves that enhances this ability. However, his strength as a fighter and his natural ability of summoning fire seemingly forced him into the position of the Dragon Slayer, which is what his family name "Kusanagi" means in Japanese.

His name also plagues him between the rivalry with Iori Yagami, heir of the dreaded Yagami Clan. The Kusanagi and Yagami clans have been warring since ancient times, and the descendants have inherited this hate against each other throughout history. Now, Kyo and Iori are expected to settle the long feud, and both of them seem more than eager to do so. Who will be the victor?

This time around, Kyo has a "disciple", Shingo Yabuki, who Kyo merely thinks of as a kind of a servant. He makes Shingo dash into the huge crowd of swarming students during their lunch break to get him a sandwich or two, while Kyo himself takes a nap on the school roof. In return, Kyo teaches Shingo his martial arts. It seems that Kyo is having a hard time telling Shingo that hard work isn't the key in summoning the flames...