touga

At an unknown time in the distant past, Tōga discovered the Sō'unga, the sentient sword from Hell, whose soul was the ancient spirit of an evil demon. He took possession of the hellish sword in order to contain it. 600 years ago in the Heian period, Tōga had fought with Kirinmaru, the Lord of the Eastern Lands in battle as he cut his left horn and right arm. After he defeated Kirinmaru, he tells him not to bring his daughter Rion in battle.[3][4] One century later in 1005 AD after this, Tōga joined forces with him in order to destroy the Grim Comet, a comet that would travel close to Earth every 500 years, causing war and famine to spread throughout the land, causing the deaths of many people. With their combined power, the two lords were able to destroy a fragment of the comet.[5]

At some point during the Kamakura era, Tōga fell in love with a human noblewoman named Izayoi, which led him to task Tōtōsai to use one of his fangs to forge the sword Tessaiga.[6] He continued traveling and challenged great demons (occasionally crossing paths with Sesshōmaru, who would ignore his advice). Among them were the invasion of a Mongol army led by the Lord Hyōga and his son Menōmaru of their clan,[7] and the Panther demon tribe led by the Panther King.[8] His earliest known adversary was the daiyōkai Shishinki, who lost half of his face and had part of his Meidō Zangetsuha absorbed by the Tessaiga.[9] However, since it was an incomplete and unstable technique, Tōga had it sealed within Tenseiga which was sheared from Tessaiga by Tōtōsai.[10]