Yumiko Nakanishi

Poemi "Kobayashi" Watanabe has a body full of wasteful energy and an airheaded attitude toward every aspect in her life. Though directionless, she speeds ahead at full throttle to achieve her dream of becoming a famous voice actress. However, when mysterious aliens come to Earth and upend Poemi's life, she must utilize every ounce of her power—including magic which she gains from a magic fish—if she wants to save the world. [Written by MAL Rewrite]

A "Guardian of Death" is investigating a series of what seem to be vampire attacks in Nagasaki.