Mizu

Mizu (水; literally meaning, "Water") is an elemental ability used by the members of the Ryōma family. It was created from a contract made from a water god who had the same name.

This elemental ability is said to be the less destructive but the most efficent. The water the family controls allows them to freely move through rivers or swim under the water in oceans or ponds without holding their breath. This is also very defensive as they can create water from the hydrogen in the air and form shapes of all sizes around their bodies for protection against their enemies. With this elemental ability, there are also able to strike direct points in one's own vital spots such as the heart or lung, leaving no trace behind making the ones who accuse them of the murder confused and baffled.