acquires the ability to become from his summoning training, and then with a modified ancient vocal weapon known as the . Real name , he is a composed member of an Oni family that oversee Takeshi's Yoshino headquarters and takes that position of protecting others and taking extremely dangerous missions with pride. But Ibuki gradually begins fearing death while realizing he was not as strong as he assumed himself to be, though he musters the courage to help Hibiki during the Orochi event. Using the , he can transform into and use his trumpet gun as a weapon. Ibuki's apprentice, who wanted to become an Oni out of revenge after her parents were killed by Makamou. While able to become an Oni, she eventually gives up her goal of being an Oni following her time with Shuki and resumes a normal life. Real name , he was originally an apprentice to Zanki who resolved to make a name for himself as the present-day rather than inherit his master's title. To transform, Todoroki uses the bracelet. After becoming an official Oni, Todoroki is given his mentor's guitar for his own. Real name , he is among the most seasoned of the Oni with Todoroki as his apprentice. Using the bracelet, he can transform into and uses his guitar as his weapon. Due to an injury he suffered from mentor Shuki during his days as her apprentice, Zanki resolves to serve as Todoroki's support while his apprentice takes over his duties as an Oni. While he ended up dead when forced to transform again, he uses a forbidden spell Shuki taught him to remain among the living until Todoroki is able to stand on his own two feet. The current head official of Takeshi's Kantō branch and father of the Tachibana sisters, a cheerful man who gives the Oni under him thoughtful advice while sending them out on their missions while having a personal library where he researches the Makamou. The eldest Tachibana sister, a very intelligent individual who usually acts as a field support by providing the Oni supplies and extra Disc Animals. The youngest Tachibana sister, a cheerful girl who usually hangs around Takeshi Headquarters to track the Makamou and rarely goes out into the field. Takeshi's equipment and weapons designer. She is responsible for creating the sound weapons for the Oni and the Disc Animals. She is an old