Eriru

Eriru is the second of the Dark Lovers. She's an idiot, but she is very dangerous and mean when she changes her personality.

She's a demon with "two faces"normally, she is usually silly and nice, but when she spins around, her eyes glow red and she becomes a more malignant girl that controls water. Although she's a fan of Gaito, she thinks she has a better plan to catch the Mermaid Princesses than him.

However she still fails and Gaito rejects her fondness for him due to her stupidity.