Kou Yamori  

, 夜守 コウ

Yamori Kou is known for being friendly and well-liked by many people. Despite appearing successful in his studies, he secretly desires more from life than just being a perfect student. He struggles with feeling motivated to continue performing at such high levels and has difficulty empathizing with others, causing him to withdraw from school activities and eventually drop out. Yamori dreams of becoming a vampire but is unsure about the concept of love and enlists Nanakusa Nazuna's help in achieving his goal.