The Forgotten One

PJO x HP Percy Potter is the forgotten brother of the infamous, Harry Potter.

Percy Jackson's father is a Greek god and had left when he was born, and his mother died only moments after giving labor. Lily and James Potter thought they couldn't have a child. They had tried many times before but have failed. They came across a certain sea green eyed boy in an orphanage, and adopted him. But only a month later they found out Lily was expecting. Harry was born and the two baby Potters were loved equally. Friends of Lily and James were astonished by their similar appearance and the boys were often mistaken as twins.
One Halloween night, Lily and James went out to a Halloween party and left the boys with a babysitter. The Dark Lord of the wizarding realm, came to their home hoping to rid the child destined to be his downfall according to a prophecy. He killed the babysitter and went upstairs to finish the job. But he found two children in the room and decided to kill both. Both Harry and Percy were hit with the curse but the curse on Harry repelled because of the power of love from Lily and the spell did not harm Percy for he was a demigod. James and Lily returned home and found their home a mess but their boys safe.
Dumbledore, the leader of the Order of the Phoenix, came to the Potters' home along with the wizarding press. Dumbledore told the press and the Potters that Harry had been hit with the killing curse and had survived thus the lightning bolt scar. Papers were printed and sold throughout the wizarding world;
"THE DARK LORD GONE!" and "THE BOY-WHO-LIVED"
Nowhere in the papers was Percy mentioned.