Shiki Tohno (遠野 志貴, Tōno Shiki) is the protagonist of Tsukihime. Born as Shiki Nanaya, to the Nanaya clan of demon-killing assassins, Shiki was adopted by Makihisa Tohno after the eradication of the Nanaya clan. He was raised as Shiki Tohno, lost memory of his former life as one of the Nanaya, and continued his life. After a life-threatening accident nearly killed him, Shiki gained the ability to see the concept of death itself, and was sent away by his adoptive father to live with the Arima family branch.