Cleo Sertori

Cleo Sertori is one of the main characters who becomes a mermaid in the Australian television series, H2O: Just Add Water. Along with Emma and Rikki, Cleo discovers her powers after her trip to Mako Island.

Friends: Emma, Rikki, Lydia, Amanda Payne, Lincolin Loud, Lori Loud, Leni Loud, Luna Loud, Luan Loud, Lynn Loud JR, Lucy Loud, Lana Loud, Lola Loud, Lisa Loud, Ford Pines, Bender, Skipper, Rick Sanchez, Twilight Sparkle, Discord, Marcus, Slade Wilson, Anti Cosmo

Enemies: Eobard Thawne, The Joker, Toffee, Bill Cipher, The Legion of Past, Present and Future Evil, The Wierdmageon Cults