Katie is a young girl from the Enterprise-D who is abducted with six other children by the sterile Aldeans and placed with the musician Melian.
Katie appears in When the Bough Breaks. She is among the children beamed from the Enterprise-D when the people of the cloaked world Aldea, unable to have offspring of their own, decide to take the next generation they need from the visiting starship.
Each child is matched with an Aldean household according to natural talent. Katie is given to Melian, an elderly musician, who introduces her to an instrument that turns the player's thoughts and feelings directly into sound, and she quickly produces music with it.
She joins Wesley Crusher's campaign of passive resistance, refusing to eat or cooperate until the children are returned. Once the Aldeans learn that their planetary shield is the cause of their sterility, Katie goes home with the others.