Terakomari is a shut-in vampire and the main character of this story. She is the second born daughter of the prestigious and powerful Gandesblood family. After living as a shut-in for three years, she was appointed by the Empress to be a the new commander of the Mulnite Imperial Army's 7th Unit of ruffians and criminals. Due to her inability to consume blood, she is left powerless and must hide this fact from her unit to prevent them from rebelling against her.