Sixteen year old mergirls. Cleo has dark purple hair and eyes she's the princess of the merfolks and has a sister named Kim who's 14 who has aqua blue hair and purple eyes she looks exactly like there father and Cleo looks exactly like her Mother. Cleo personality is stubborn, careless, kind, and caring she also has a boyfriend named Lewis who has brown hair and he is a human god peagsus, she's known Lewis since they were 14 and they have been dating since that age too and there now 16. Athena who has red hair and red eyes in a tie ponytail she dislikes humans because humans killed her mother a long time ago and all she has now is her father and she has a brother named Aaron who looks just like Athena and is also 14 the same age as Cleo sister and Kim and Aaron have a crush on eachother. Emma has golden blonde hair and teal eyes she doesn't get along with her mother side of the family only her father side of the family because when she needed them most they were never there for her so she does not like them.

Cleo, Emma, and Athena known eachother since 5th. The girls all live in a penthouse in the human world because the enemies of all merfolks named "Seaursla" and "Mahalla" always try to to take over the world by finding the 3 crystals. "Water", "Fire", and "Ice" those are Powerful crystals so they try there best to find it before there enemies do and the human world needs protection from harm even though some merfolks don't care the girls do Athena cares sometimes but not a lot. They were 15 when they met "Zane" he has black hair and brown eyes and is always annoying Athena every chance he get clearly having a crush on her which Cleo and Emma thinks, Lewis doesn't go to there school since hes a protected and the prince. They are 16 now Cleo, Athena and Emma are in the living room in there penthouse talking and they hear a knock on the door and Cleo answers it and she sees Lewis hurt bad, they bring him to the room as Cleo heals him but worried so are her friends.

Lewis: This creature wants to kill you Cleo..