Izuru is the first member of the Dark Lovers that appears and she's considered the smartest by a lot of people. She has power to controle waves and monsters created of water.     She is obsessed with winning Gaito's heart. 

As the mermaid princess of the North Pacific (one of the seven mermaid kingdoms), Lucia entrusts a magical pearl to a boy who falls overboard a ship one night. Lucia must travel to the human world to reclaim her pearl and protect the mermaid kingdoms. Using the power of music Lucia is able to protect herself and the mermaid kingdoms from a growing evil force.

Hobbies: Playing drums, watching stage drama, watching video

An italian actress, voice actress and ADR scriptwriter, mostly known for her roles as [Son Goku](https://anilist.co/character/246/Goku-Son), [Son Gohan](https://anilist.co/character/2093/Gohan-Son) and [Son Goten](https://anilist.co/character/2551/Goten-Son) as kids, as well as [Nico Robin](https://anilist.co/character/61/Robin-Nico), [Arale Norimaki](https://anilist.co/character/3182/Arale-Norimaki), [Suneo Honekawa](https://anilist.co/character/8261/Suneo-Honekawa), [Ayumi Yoshida](https://anilist.co/character/4228/Ayumi-Yoshida) and [Queen Serenity](https://anilist.co/character/17010/Queen-Serenity).

Lucia is the new girl at school. She and her sister run a public bath that's all the rage. When Lucia meets a terrific-looking surfer boy, there's just one little problem: Lucia is a mermaid-not just any mermaid, but a princess on an important mission to save the seven seas from an evil force bent on taking control of the marine world. Such a responsibility doesn't leave much time for romance. But Lucia vows to protect her world and win the heart of handsome Kaito. 
(Source: Del Rey) 
Note: Includes the one-shots Moonlight Goddess Diana (MOONLIGHT GODDESS ディアナ), Nude ni Natte (ヌードになって, Get Nude) and Cherry Blossom (チェリー ブロッサム), contained within Volume 7 of the manga.