There are three mermaid Teengear girls named Cleo, Scarlet, and Emma. Cleo has dark blue hair and aqua eyes and she works at the aquarium she has a younger sister who's 13 named Kim she has brown hair and aqua eyes she's really annoying and rude to her sister but loves her a lot. Scarlet has red hair and eyes she has a father who looks just like her, her mother died when she was 3 by a human and her father started to date this human girl named Danielle a few months later who has black hair and brown eyes and Scarlet has a half brother named Samuel who does not knowing his half-sister and dad are Merfolks only Danielle knows and he's the same age as Kim also friends with her, Scarlet is a very determined, hothead, and caring person who dislike humans but grew up in a human city her whole life and her only bestfriends would be Cleo and Emma and other Merfolks back in the seaworld Zaheen. Emma has black hair and yellow eyes her mother Erica is around looks just like her but her dad left her and her mom when they needed him most, she doesn't really trust boys or men after her father abondon her, she has a brother named Ethan who's Cleo sister Kim age and they are bestfriends and Ethan has a crush on her.

Cleo, Emma, and Scarlet have been friends since 4th grade, they have all been to eachothers family dinners so they are basically family friends to each and one of their families. Cleo, Emma, and Scarlet are all friends with a human body named Lewis who has dark blonde hair and brown eyes and he wears eye glasses Emma will talk to him just won't like tell him her business since she has trust issues for guys. Cleo and Lewis eventually started to date and are a happy couple but she doesn't tell him she's a mermaid because of how he'll react. During Cleo work shift at the Aquarium as Scarlet and Emma decide to watch how she does her job she sees a dolphin who's there friend named Finn hurt

Scarlet: Finn! What happened to you she kneels down beside Cleo

Finn then whimpers

Finn: T-These human hunters hurt me..