Arsenal

Roy Harper was once known as Speedy, the original sidekick to the Green Arrow before being thrown onto the streets by Arrow for being addicted to narcotics. Roy changed his name to Red Arrow, but now he goes by the alias Arsenal.

History
Roy Harper went back to live on his Native American tribe's reservation after Green Arrow kicked him out for his narcotics addiction. The reservation he lived on just so happened to be the same one that the superhero the Apache Chief lived on as well.

Red Arrow's first main story was when he was being framed by the villains Merlyn and Count Vertigo for several murders. Green Arrow and his partners Azrael and Blue Devil tracked down Roy, and after a brief scuffle concluded that he was being set up. Roy and his old mentor were still on bad terms, but they decided to work together to find the culprits anyways. Even after they managed to defeat the villains responsible, they failed to reconcile things before parting ways.

Roy then was seen teaming up with his old friend Dick Grayson, who had been the original Robin when Roy was Speedy. Much like Roy, Grayson had long since abandoned his childhood identity and now operated as Nightwing. And also like Roy, he had departed from his old mentor. After reuniting with Nightwing, Roy decided to change his superhero name from Red Arrow to Arsenal. The two were founding members of the team of young superheroes called Young Justice.