Chizuru is the heroine of the series. She comes to Kyoto in search of her missing father, Kodou Yukimura (雪村綱道, Yukimura Kodou?), a practioner of Western medicine. Unknown to Chizuru, her father under orders from the Shogunate develops the "ochimizu", an elixir that increases the drinker's healing abilities, speed, and strength but which also turns the drinker into a vampire-like monster called a Rasetsu. At the beginning of the series, she is seen being chased by two men, who were suddenly attacked by a Rasetsu.
Text from wikipedia
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