Natsuno Yuuki is a fictional character from the manga series Shiki, created by Fuyumi Ono. He is a high school student living in the rural village of Sotoba, where mysterious deaths begin to occur. Natsuno is initially skeptical about the supernatural events surrounding him, but as the story unfolds, he becomes increasingly involved in the struggle against the Shiki, a group of vampires responsible for the chaos. Throughout the series, Natsuno's character evolves from a detached observer to a determined fighter. His relationships with other villagers, including Toshio Ozaki and Megumi Shimizu, play a significant role in his development. The narrative explores themes of fear, isolation, and the impact of the supernatural on human lives.