Ryouko Hakubi

Ryoko Hakubi is a main character in the Tenchi Muyo! metaseries. She is a semi-reformed space pirate who is madly in love with Tenchi Masaki, the main protagonist. She is always shown to have a very competitive relationship with Princess Ayeka, who also has a very strong romantic interest in Tenchi.

In the Tenchi Muyo OVA Ryoko is a binary clone, the product of combining the DNA from an ova of Washu Hakubi with the DNA of a powerful aquatic lifeform, known as Masu.

In the Pretty Sammy OVA, Ryoko appears as a schoolgirl, Ryoko Orikasa, a yankee. She and Ayeka constantly bicker over Tenchi Kawai's affections.