Y/n Jackson is Percy Jackson older sister three years older than him (She a mortal but she can see into the mist . ) From the the moment he was born she has tried to protect him. But how can she protect him from thing see can’t seen ever since Percy he was special. Her mother said it everyday he was special ever. was a kid he saw thing know only else could monsters trying to kill him. Y/n being a normal mortal she did not see things past the mist or at least struggle to. Everytime kick out of a new school she would have to go with him because there mother sally wanted to keep them together. And she would tell her “Percy is special, but there are those who hate that about him it your job to protect him”