What if Percy Jackson had a twin sister? One who only knew about him after the Battle with Kronos and met him a week after their birthday? Would she change The new Great Prophecy? Or would there be a different one? Read to find out! PS: Yes, the Great Prophecy will be changed, but just a little! This story is really by @Artiana and @Fearless4ever. Ask one of us if you want to know more.