Meryway Mermaid + Siren characters
Queen Dariya of Aquaria - 27, became Queen fairly recently (year or two ago) as the Old King and Queen waited a long time before having children. Cares a lot for her subjects and wants the best for her children
Areline, an extremely powerful Siren and an antagonist. For context, Sirens are mermaids who have turned to dark magic, and have named themselves after the mythological sirens. A woman who wishes for control over as much as the sea as possible.
Rhea, Muriel and Zarya, three minor villains. Once mermaids known for their beautiful song, Rhea was manipulated by Areline into turning to the dark, and later Rhea manipulated Muriel and Zarya to evil as well. Their inspirations are a mix of the Trix from Winx, the Trolls from Cinderella's Castle (though more for Muriel and Zarya), the Dazzlings from Equestria Girls and Milkymelodies Villain Huntr/x. They do eventually get redeemed but they're VERY powerful villain for a while.