Vicky is a very two-faced person, when it comes to adults (namely parents), she is a seemingly sweet girl who has a continuous liking for cash, but once all parents are gone, her true colors are revealed. She tortures Timmy so quickly that it takes one second to wreck the place and knowing that Timmy's parents are nitwits, it's easy to fool them. Timmy has always wanted payback and has always wanted to get rid of her, but whenever this dream comes true, Timmy must always revert it as something will always appear or chime in to make Timmy realize he actually needs her (such as his parents hiring a worse babysitter). The parents of children and other rich people pay her wads of cash through her babysitting. She has been transformed more times than any other human except Timmy Turner.

In the original series, after her constant torture left Timmy so miserable that he managed to gain fairies, she officially became Timmy's main target. On Timmy's first day with fairies, he pulled so many magic-induced pranks that once he had to stop, Vicky was far too suspicious. She was shown to believe that something was going on and in a way, had a similar role as Mr. Crocker. In the main series, she's completely oblivious to the fact that Timmy has fairies despite that she's usually on the receiving end of their magic, even whenever she steals a magical object from Timmy and activates it, as she believes them to simply be expensive fancy things from off the internet.