Caren

Caren is the Mermaid Princess of the Antarctic Ocean, and the keeper of the Purple Pearl. She is the fourth Mermaid to appear in the series. She has three different forms: Mermaid Caren, Human Caren, and her singer form, Purple Pearl Voice. Her image song is Aurora no Kaze ni Notte.

Like Hanon and Rina, Caren also escaped to the human world when Gaito attacked her kingdom. However, even though she is found out by the trio, she refuses to join them. Initially, she shows hatred for Rina. Why? Karen is the younger sister of Noel, who was captured by Gaito. She heard how Rina was with Noel at that time, and was told that Rina left Noel behind.
~!In reality, Noel sacrificed herself to save Rina.!~

Caren, therefore, resolves to save Noel on her own. But, eventually, Caren ends up saving the trio on various occasions, especially when the Black Beauty Sisters are introduced.

~!Near the end of the first season, Caren sides with the trio as they are about to face the final battle against Gaito. After the defeat of Gaito, Karen leaves to help rebuild her kingdom. She returns to the human world with Noel and Coco, and they end up becoming comic relief. Caren also returns for the battle against Michel.!~

At first, Caren is strict, and even a bit mean, but she starts to warm up to the trio and shows her playful side a bit. In Pure, Caren is energetic and playful, unlike in the manga, where Caren's personality was not fully revealed.