Connor was Timmy Turner.
Diana was Wanda.
Trevor was Cosmo.
Together, they were the cast of "The Fairly Oddparents!"
The girl next to Trevor is Christy. She was a sorceress or something. Connor referred to her as "Vicky" because that's the name of Timmy's babysitter. :)
UPDATED: I have become what I have sneered at.
15 hours ago