Blue jester ( A Sage Phillips cosplay fanfic book one)

Sage Philips , was always secretive and quite always leaving the room just as something where to happen to go fight crime . No one knew he would go fight crime as Night-wing
He happened to be the oldest adopted son of the city's biggest multibillionaire, Bruce Wayne since he took him in , Sage had always been known for his martial arts skills in the city and one night in the City of Gotham he had met his match, and has to get help from the one villain who really seems to be more of a anti villain the one and only Harley Quinn (Eliza tot ).
Harley was his only hope to save, after joker Harley had taken a path down towards heroism.