Stefy is a smart, straight-talking girl who has a very clear understanding of the real world and everyone in it. She's top of the class, intelligent and funny. She's highly skilled at computing and the data-seeker of the group. She likes jokes and finds the humour in situations, being the perfect balance to Charly's mad ideas. She's in fact the real leader of the gang, all common sense and character, fiercely loyal. She just has one weak point: she is not immune to the charms of cute boys!