Perseus Jackson was many things. She had seen many things and that of course included her figuring out Batman's identity from a newspaper clipping, an injury her best friend had sustained and an inquiry with her uncle. This was years ago, and Percy has been working with Batman and Robin for years, since she was 10 and a half (her mother agreed). She dropped school after 6th grade, that being the grade her life went to more schist than before. Sally had agreed that it was for the best. Percy Jackson, or Fury as her hero persona, juggled demigod duties and hero duties. Don't worry though, Bruce/Batman knows that she is a demigod.