Mina Tatebayashi (館林 水奈, Tatebayashi Mina) is half-mermaid half-vampire yōkai child living in Sakurashinmachi. She is the twin sister of Kana Tatebayashi and their guardian is Shidō Mizuki.


She is wearing a white jacket.She has silver hair and blue eyes.



Mina along with her twin sister Kana were born to a vampire police officer and a mermaid. Shortly after they were born, both parents died in an incident, leaving them in the care of Shidō Mizuki who feels guilt over not being able to protect their parents.



Water Induced Growth: Due to her mermaid half being more prominent, exposure to water will cause Mina to grow, giving her the appearance of a teenager or young adult.

Enhanced Endurance: Due to her vampiric and mermaid origins, Mina is able to survive incidents which would kill regular humans.

Accelerated Healing: Mina is shown to recover from injuries inflicted by Touka quickly possibly due to her vampiric and mermaid origins.