Kai Mikawa

Kai Mikawa is the heir to a massive corporation. He is currently competing for the same romantic interest as another character. Originally a killer whale from a different mermaid community, he undergoes a strange transformation into a full whale when exposed to water. Because of severe agoraphobia, he moves through the world primarily using submarines and wears spacesuits in open areas. While searching for a servant, he forms a bond with Saru.