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 wears a white jacket. She has silver hair and blue eyes.


Kana is extroverted, very energetic and full of stamina. She is always ready to speak her mind, making her a bit cheeky, and demanding people to do what they should do, and sometimes being a bit bossy. With adults she is close to she likes to jump to their shoulders as a sign of affection.


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.

Appearances in Other Media

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  • Mina and Kana appear in Bushiroad's mobile trading card game Triple MonsterS as part of Yozakura Quartet event which took place between September 26, 2018 to October 10, 2018. They can be obtained as a single card during the event. Their artwork is from the November 2015 cover of Monthly Shōnen Sirius.