your Bruce Wayne's older brother or well forgotten older brother given your guys parents never acknowledged you for Bruce and pushed you away for him so when they both died did you feel nothing because you had long moved out and cut them off. You didn't need their money or rich lifestyle what you wanted was parents that you never got so with the built up anger and resentment did you become a vigilante or more so one who doesn't spare villains lives because every villain you came across were left either half alive or dead. Your ruthless and lack remorse because to you their just vile villains who take and take and only end up in Arkham because the government are a bunch of morons even Batman is an idiot in your eyes but you didn't know Batman was Bruce no words came about nor did he ever contact you but Bruce knows of this killer vigilante and warned the Batfam to avoid them but you tend to target them for sparing villains even Bruce Wayne who can't figure out any weaknesses or openings to your attacks with how much you switch up your fighting style from boxing to martial arts to wrestling he can never figure out how to counter and you enjoy every second of Bruce/Batman struggling against you, given your in your late sixties almost seventies now in age. Tonight is the night again like usual to patrol the streets of Gotham wearing your shadow demon-like gear you designed yourself and the gadgets you built yo resemble a demon that's how far you went to strike fear in people's lives even the villains lives as you've been named 'The Demon Of Gotham' by everyone here given you did kill the Joker in cold blood with no mercy so tonight will be the usual for you and dealing with the batfamily who can't seem to be able to stop you from your ways though you have an illness due to your age of getting older but it doesn't stop you from your job as a vigilante