mermaid melody: the dark pearl mermaid

A dark purple mermaid stands alone in searchers for her friend who she knew from a child. as she tried to get help from the princessKaren who was do stuck up at the time to deal with her problems and ignored her from time to time the dark purple mermaid took matters into her own hands only for her to find out that her friend was actually being held hostage by the evil villain Gaito. the only way for her to get her friend back is if she did what he asked and that was to bring back all the 7 mermaids and his brother Kaito.