Wadanohara (大海原) is the main protagonist of Wadanohara and the Great Blue Sea. She is a young sea witch and the daughter of Meikai, the Great Sorcerer. She cares deeply for the sea and her familiar Samekichi. Wadanohara has no breasts and is "an eternal chopping board (flat)." Wadanohara's second outfit, given to her by Tatsumiya, is also a sailor uniform. The shirt is dark blue with white accents. Underneath, she wears a white turtleneck. The skirt is also dark blue with a white stripe on the hem. Her blue boots are decorated with a thin white stripe. On her back is a large red, white, and blue bow. Her hair is tied with two ribbons, matching the large bow on her back. Her hat is a large blue witch hat with a similar striped ribbon accenting it, along with a silver anchor. In Wadanohara's first and second outfit, her eyes are gray. Deep-Sea Prisoner has said it is due to Wadanohara being an innocent person, unstained by any color. It was none other than Samekichi who affirmed this in her.