Percy was twenty years of age when the bombing of London occured. Due to WWII, Percy lost his entire family. Training as a vigilante under the Shining Knight, eventually Percy Sheldrake became the Knight. Training his own son, Cyril Sheldrake, as the Squire. Joining the Club of Heroes, Percy came to believe the Club's benefactor, John Mayhew, to be a murderer. This led to his abandonment of the club. Not long after, Percy was killed by Springheeled Jack. Percy was one of the oldest vigilantes.