Mellisande is a character who appeared in the Season 7 episode Rendezvous. She was portrayed by actress and model Marliece Andrada.
She was beautiful mermaid with long blonde hair, a pearl crown and a pink and purple fish's tail.
She had a kind heart and always holds on to her hopes and dreams such as her lover Christopher promising to be with her again some day.
Not much is known about Mellisande except that she possibly lived a hundred years ago in the 19th century and met a sailor named Christopher whom she was deeply devoted to. He gave her a locket with his picture in it and promised her that he would see her again someday.
Cody, during a deep dive saw her from the corner of his eye, and he kept thinking about her.
Some other lifeguards thought he was crazy and tried to convince him that mermaids were not real, but C.J. firmly believed they existed. One time when Cody was sleeping on the beach, Mellisande communicated with him through telepathy and made him see how the two of them swam and kissed underwater.
Cody and C.J. then go to dive again in the same spot where he met Mellisande for the first time. Cody went under alone just in case she would scare her.
Mellisande and Cody did meet for real this time, but Mellisande thought him to be her lost lover Christopher because of the strong resemblence. While Cody was underwater without an air supply, Mellisande gave him air, but C.J. got worried and jumped in herself scaring her away.
Mellisande returned only to see them kissing on the boat, and felt betrayed, since she still though him to be Christopher. When C.J. dived in to see the mermaid for herself and got knocked out by accident, Mellisande then helped her on the surface and left her medallion with her. Cody and C.J. saw Christopher's picture in the medallion, and were amazed by the resemblance.
They decided to toss the locket back into the water to keep her secret safe from the world after remembering what happened to another mermaid named Madison in the movie Splash. Mellisande returned and retrieved it, still hoping to meet Christopher again someday.
This was Marliece's first role in the series before she played lifeguard Sky Bergman in Season 8.