Mibu, Kyoushirou

壬生京四郎

Mibu Kyoushirou's personality is nearly the exact opposite of the series' protagonist, Demon Eyes Kyou. While he appears awkward and humorous at the start of the adventure, Mibu Kyoushirou is actually a terrifying fighter known as "the Demon-God," the only person to have defeated Kyou. Kyoushirou possesses the ability to transfer human souls. He utilizes this power to move Kyou's soul into his own body while concealing Kyou's original body. In the past, he killed numerous individuals, including Shiina Yuya's brother, Shiina Nozomu. He is, in fact, a high-ranking member of the Mibu clan, gifted with swordsmanship, and is considered the clan's finest swordsman to date. He is proficient in the techniques of the Mumyou Jinpu Ryuu and was the former owner of the Shibien. In terms of comparison, his skill and potential place him on par with Kyo and just below the former Crimson King.
His sole desire is to protect Sakuya, whom he loves alongside Kyou prior to the Battle of Sekigahara. The manga reveals that he has always been in love with Sakuya, and Kyou is a dear, close friend who cares for them both. He cares deeply for Yuya and would do anything to protect her, stating that he will not allow Kyou to have her. Additionally, Sasuke notes how Kyoushirou looks at Yuya tenderly, as seen in Chapter 234.
Mibu Kyoushirou is one of the Red Cross Knights, created from the flesh and blood of the former Aka no Ou. He was a killing machine, yet he possessed a very friendly heart, becoming friendly only under Sakuya's influence. He was also a master of the Mumyo Jinpu Ryuu Satsujin Ken. He once wielded the Shibien, one of Muramasa's Devil Swords, and killed many people with it until the sword turned black from absorbing too much blood.
At the end of the manga, it is shown that Kyoushirou is living with Sakuya and visits Yuya and Kyou.