Ekidiski- A Promise of Revenge (Percy Jackson)

When Perseus Jackson is left, cast aside by his own family, driven into isolation by a paranoid king.
He leaves camp walking away from everything he knew, his family that had died, his girlfriend that had abandoned him, his friends who mocked him, his father who disowned him, his cousins that thought of him a traitor.

When he left he was lost, in a world too large without his friends and family.
But at his most dire hour he was found, by the goddess of revenge.

Nemesis, who had seen him suffer, lifted him up and gave him a reason, a reason to live.
She became his patron and blessed him with powers to give pain to his offenders.
And on that day Perseus Jackson was reborn, Ekidiski, Revenge.
And he promised it to anyone who wronged him.