Well getting betrayed and then becoming mortal was not in Percy's bucket list .
But it happened.
And it was horrible.
But then again he started his life as mortal and became a successful singer in a band made by him and his mortal friends.
But again he got betrayed by his so called mortal friends.
He wanted to end his life and then again he became the most powerful being.
He hated Chaos, Order, Gods, Demigods and Chaos Assassins.
But only thing he loved was his sister.
He came back again to just save her sister after becoming.
ALL FATHER OF UNIVERSE, VOID.