Vigilante (concept)

A vigilante, also known as a "mask", is an individual who takes the law into their own hands, believing that the police and the court system are unable and unreliable to bring criminals to justice. However, not all vigilantes are fighting for justice, some do it out of personal revenge and antagonistic reasoning. It is also common for vigilantes to take on a moniker to be known by, some by personal choice and others having been named by the public.

Heroes

 * Barry Allen/The Flash
 * Helena Bertinelli/The Huntress (formerly; turned rogue)
 * John Diggle/Spartan
 * Firestorm
 * Jefferson Jackson
 * Ronnie Raymond/Firestorm (status unknown)
 * Martin Stein
 * Ted Grant/Wildcat (retired)
 * Carter Hall/Hawkman (deceased)
 * Roy Harper/Arsenal (retired)
 * Connor Hawke/Green Arrow (in a potential future)
 * Curtis Holt
 * "Rip Hunter"
 * Laurel Lance/Black Canary (deceased)
 * Sara Lance/The Canary/White Canary
 * Quentin Lance/Detective
 * Mari McCabe/Vixen
 * Oliver Queen/Green Arrow
 * Thea Queen/Speedy
 * Ray Palmer/The Atom
 * Cisco Ramon/Vibe
 * Hartley Rathaway/Pied Piper (new timeline)
 * Mick Rory/Heat Wave (anti-hero)
 * Kendra Saunders/Hawgirl
 * Felicity Smoak/Overwatch (formerly)
 * Leonard Snart/Captain Cold (anti-hero)
 * Caitlin Snow
 * Eddie Thawne (deceased)
 * Tatsu Yamashiro

Villains

 * Aglin (formerly; incarcerated)
 * Baker (formerly; incarcerated)
 * Helena Bertinelli/The Huntress (formerly; incarcerated)
 * Colton (formerly; incarcerated)
 * Carrie Cutter/Cupid (formerly; incarcerated)
 * Jeff Deveau (formerly; incarcerated)
 * Eliza Harmon/Trajectory (deceased)
 * Joseph Falk/The Savior (deceased)
 * Lonnie Machin
 * Malcom Merlyn/Dark Archer
 * Hartley Rathaway/Pied Piper (reformed)
 * Isaac Stanzler (deceased)
 * Eobard Thawne/Reverse-Flash (unborn, preserved in the Speed Force)

Heroes

 * Robert Queen/The Arrow

Villains

 * Deathstorm (inactive)
 * Ronnie Raymond (deceased)
 * Martin Stein (deceased)
 * Shay Lamden/King Shark (formerly; incarcelated)
 * Linda Park/Dr. Light
 * Cisco Ramon/Reverb (deceased)
 * Al Rothstein/Atom-Smasher (deceased)
 * Eddie Slick/Sand Demon (deceased)
 * Caitlin Snow/Killer Frost (deceased)
 * Hunter Zolomon/Zoom

Heroes

 * Kara Danvers/Kara Zor-El/Supergirl
 * J'onn J'onzz/Hank Henshaw/Martian Manhunter
 * Clark Kent/Kal-El/Superman

Vigilante teams

 * Rip Hunter's team
 * Team Arrow
 * Team Flash
 * The Hoods (inactive)