“Marina was a mermaid princess and daughter of King Neptune in 2 episodes of “Power Rangers: Lightspeed Rescue.”
She had been left for dead by an unknown Evil, until Vypra rescued her and tricked her into capturing Chad, the Blue Lightspeed Ranger. As time went on, she grew to love Chad, even though she knew that their relationship could never be possible. (similar to Hans Christian Andersen’s story of The Little Mermaid) Marina appeared in 2 episodes, “Ocean Blue” and “Neptune’s Daughter”
Marina almost perished while on land, but Chad was able to get her back to the ocean, allowing her to live. In the end, she’d asked her father to make her human again to spend one last day with Chad.