Wanda Venus Fairywinkle-Cosma
is one of the main character in the series, who is one of Timmys fairy godparents, alongside her husband cosmo, and her son Poof. Unlike her husband, Wanda tends to be more responsible and is reluctant to grant dumb wishes, but is usually obliged to grant them anyway or Cosmo grants them instead. Wanda is voiced by Lee in the cartoon, who also voiced the CGI version of Wanda in the live action "[[A Fairly Odd Movie: Grow Up, Timmy. 

Bright and compassionate, Wanda loves her current godchild Timmy just as much as she loves her son, Poof, and husband cosmo. She is also the most responsible out of the bunch. In , it is revealed that Cosmo was the last baby born in Fairly World (before Poof), implying that Wanda is slightly older than him, and is the oldest of Timmy's fairies. She is often blamed for the misadventures that she and her family get themselves into by Jordan, who states she should take care to watch them better because of Cosmo's dangerous stupidity. She always loses to Cosmo when it comes to second guessing what Timmy wants to do, usually because Timmy wants to do something fun or destructive. She was apparently very popular in high school. secrecy and reluctance to kiss her. Wanda and Cosmo initially decide to not rescue her so that they can stay with Timmy, but Poof gives them an "intense stare of guilt" and brings them to realize they've been doing the wrong thing. They are then suddenly captured by Mr. Crocker and placed in his , where their magic is rerouted so that are forced to grant Magnate's wishes, which also gradually drains their life force. However, Timmy manages to save them by confessing his love to Tootie and passionately kissing her, which causes him to officially lose his fairies due to him having now officially grown up, but also frees them from Magnate. In the end, because of how much Timmy loved them,(mostly Wanda) though, the Fairly adds the Timmy to Da Rules allowing Wanda, Cosmo, and Poof to stay with Timmy into his adulthood, and with Tootie allowed to know of their existence.