Kyoshiro Mibu

He is the one who fought against Kyo and Aokigahara and won, after that they fought they started to share the same body. Yuya founds him when searching for the man with the cross scar on the back, he looks like an harmless medicine seller, until they here attacked and the personality changed to Kyo. One of the most important parts is when he appears to fight against Nobunaga at the Jigokumon, and the final fight in Kyo's true body against Kyo in his body, when Kyoshiro was fighting just to protect Sakuya.