Yoka

Yoka is Chou Kou Mei's disciple. He fought Kou Hiko on the fourth floor of "Queen Joker." He is the youkai sennin whose true form is a sword. He have been living in the human world as the Yin general and was known for his hobby of collecting all kind of swords.
The paopei he uses are Banjinsha - explosive shuriken and Kaketsu Shintou blade-balls with paralysing poison. He also gave Kou Hiko a talking sword paopei Hitou.