Katie is pretty ordinary for a fairy. Like most of her friends, she enjoys teasing the humans who wander into the forest using her unique magical gifts. Katie is particularly good at changing her size and hiding her wings to disguise herself as a human. Her most insidious ability is charm magic that drives the lusts of humans wild.

Her magic works especially well on those with male organs. She can even curse a cock to stay hard and balls to remain full. The effects can last for weeks or even months, and the only way of ending the curse sooner is to empty a load into Katie's body.

Though in truth, it isn't her powers that favor males so much as her own preferences. Katie has a bit of a masochistic streak, and wants her victims to hunt her down so they can vengefully pound her to break her spell. Her body In her true form is very resilient, which allows her to survive this sort of rough treatment even if she is much smaller than a human woman.