- This article is about the original character. You may be looking for Mermista from She-Ra and the Princesses of Power series.
Mermista is the beautiful princess of Salineas, an underwater city on Etheria.
Mermista's father King Mercia believes it best to leave The Horde alone, in the hope that they will respect his decision and leave him and his people in peace. Mermista knows that The Horde will stop at nothing to conquer all of Etheria and she is the only member of the people of Salineas who supports the Rebellion. Mermista can transform from her mermaid form to a human one. She possesses psionic control of the element of water and telepathy with sea creatures.