Shiki Ryougi is a fictional character from the visual novel series Tsukihime, created by Type-Moon. She is known for her unique ability called the "Mystic Eyes of Death Perception," which allows her to see the death of living beings and objects. This power enables her to perceive the "lines of death" and eliminate targets by severing these lines. Ryougi is a member of the Ryougi family and has a dual personality, often referred to as "Shiki" and "Shiki Ryougi." The character is central to the story's themes of life, death, and the nature of existence, making her a complex and intriguing figure in the Type-Moon universe.