Takeshi Onimaru  

Fuujin, 鬼丸猛

Takeshi is the main adversary in Yaiba's story. Initially, he was an accomplished high school swordsman, but after his fight with Yaiba ended in a tie, he decided to intensify his training. Eventually, he discovered a concealed basement containing the statues of Thunder God and Devil Wind, along with a sword. When he wielded the Devil Wind sword, he was possessed and grew horns, transforming into the embodiment of Devil Wind. Despite using the Devil Wind sword, Takeshi gave it to Yaiba after acquiring the "Mao-Ken" Black Moon sword. As is typical of villains, Onimaru has an army of faceless minions who are nothing more than humanoid black figures with eyes, mouths, and a single horn protruding from their foreheads.