Sonshi busts out a pair of sai in #18, something that Yasuaki Kurata is known for. There's an old Hongkong movie where he goes with his sai against Sammo Hung who's armed with tennis rackets!And Sammo wins!
Aguri's Makai Knight title is Sky Bow Knight GAI. Junya Ikeda, who played Takeru, previously played the Sixth Ranger named Gai.
The Dragon, Sonshi is played by veteran martial arts actor, Yasuaki Kurata. He's famous for starring in films such as Fist of Legend opposite Jet Li and Heroes of the East opposite Gordon Liu. And this isn't his first toku either, having played Akashi Kouichi. With a pedigree like that, he easily curbstomps the heroes.