Kana Tatebayashi  

, 館林 火奈

Kana is a unique individual who possesses both mermaid and vampire characteristics. At five years old, she is under the guardianship of Shidou following an unfortunate incident that occurred shortly after her birth. Unlike her twin Mina, Kana's blood composition is more similar to that of a vampire, which causes her body to grow into a teenager-like form when she consumes blood. Additionally, Kana is characterized by being soft-spoken and consistently expressing apologies for Mina's impolite behavior.