Sheshe

As a primary antagonist in the Mermaid Melody series, this villainous figure forms one half of the notorious Black Beauty Sisters alongside her sibling, Mimi. While she is widely recognized as the more malicious and calculating of the duo, her cold exterior hides a deep, protective devotion to her younger sister. Driven by a wicked nature, she plays a pivotal role in the series' conflict through her intense bond with Mimi.