Mina Tatebayashi

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

History
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 feel guilt over not being able to protect them.

Abilities
Water Induced Growth: 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.