Kaze and his older twin brother, Saizo, are members of a ninja clan from Igasato that has proudly served the Hoshidan royal family for several generations. Trained from a young age, Kaze became an exemplary ninja. Some time in their past, their father, Saizo the Fourth, was killed by Kotaro in an unexplained incident. His older brother became the new head of their clan, taking up the name Saizo. While Saizo was more vindictive in seeking retribution on his father's assailant, Kaze was more coolheaded. Still, Kaze pledged to support his brother to help him take down their father's killer.

Reference Voice: https://www.youtube.com/watch?v=kOq3eqyZjbc