In this story, Perci (girl Percy Jackson) has been going to Hogwarts for 5 years and is now in her sixth year. She is a demigod. Post TLO, Perci is 17 in her sixth year. Fred and George are 16 in their sixth year. Harry, Ron, Hermione are in their fourth years. Perci will go through many challenges this year. The rest of the demigods may appear later on.