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Siren is a mythical figure played by Uniqua. She has a fun-loving personality and enjoys playing a game called "Siren Says". However, she is a sore loser and dislikes when others win the game.
Siren is mostly pink. She wears a long aqua-colored toga-style dress with white flowers and a curly blonde wig.
Uniqua has played Siren in one episode of The Backyardigans: "Sinbad Sails Alone" from season two.