User blog:TheRadion/Characters from DC comics

Note: This list is incomplete, and in no particular order. Character aliases are listed even if they are never used.

Season 1

 * Dick Grayson/Robin/Nightwing
 * Conner Kent/Superboy
 * Kal-El/Clark Kent/Superman
 * Giovanni Zatara/Zatara
 * Kaldur'ahm/Aqualad/Aquaman
 * Wally West/Kid Flash/Flash
 * Mark Desmond/Blockbuster
 * Barry Allen/Flash
 * Roy Harper/Speedy/Arsenal
 * Will Harper/Speedy/Red Arrow
 * Jim Harper/Guardian
 * Bruce Wayne/Batman
 * Orin/Arthur Curry/Aquaman
 * Dubbilex
 * Cameron Mahkent/Icicle Jr.
 * J'onn J'onzz/John Jones/Martian Manhunter
 * Oliver Queen/Green Arrow
 * M'gann M'orzz/Megan Morse/Miss Martian
 * Joker
 * Zatanna Zatara/Zatanna
 * Victor Fries/Mister Freeze
 * Edward Nigma/Riddler
 * Match
 * Lex Luthor
 * Garth/Aqualad/Tempest
 * Tula/Aquagirl
 * Black Manta
 * Lawrence "Crusher" Crock/Sportsmaster
 * Artemis Crock/Artemis/Tigress
 * Paula Crock/Huntress
 * Jade Nguyen/Cheshire
 * Werner Vertigo/Count Vertigo
 * Wotan
 * Vandal Savage
 * Billy batson/Captain Marvel/Shazam
 * Orm/Ocean-Master
 * Vulko
 * Alfred Pennyworth
 * Mera
 * Daniel Cassidy/Blue Devil
 * Red Tornado
 * Red Volcano
 * Red Torpedo
 * James Lockhart/Red Torpedo
 * Red Inferno
 * Danette Reilly/Firebrand
 * T.O. Morrow
 * Anthony Ivo/Professor Ivo
 * Amazo
 * Bromwell Stikk/Mister Twister
 * Marie Logan
 * Gar Logan/Beast Boy
 * Dinah Lance/Black Canary
 * Brain
 * Monsieur Mallah
 * Baran Flinders/Mammoth
 * Selinda Flinders/Shimmer
 * Jeffrey Burr/Kobra
 * Bane
 * Simon Jones/Psimon
 * Queen Bee
 * Teth-Adam/Black Adam
 * Pamela Isley/Poison Ivy
 * Billy Hayes/Harm
 * Greta Hayes/Secret
 * Kent Nelson/Doctor Fate
 * Nabu
 * Starro
 * Klarion The Witch-Boy
 * Teekl
 * Dragon King
 * Ted Grant/Wildcat
 * Big Bear
 * Hal Jordan/Green Lantern
 * John Stewart/Green Lantern
 * Guy Gardner/Green Lantern
 * Jim Daniels
 * Barbara Gordon/Batgirl/Oracle
 * Cat Grant
 * Karen Beecher/Bumblebee
 * Iris West-Allen
 * Malcolm Duncan/Guardian/Herald
 * Marvin White
 * Wendy Harris
 * Hamilton Hill
 * Bette Kane/Batgirl/Flamebird
 * Nathaniel Adams/Captain Atom
 * Ray Palmer/Atom
 * Albert Michaels/Atomic Skull
 * Joar Mahkent/Icicle Sr.
 * Hugo Strange
 * Amanda Waller
 * John Economos
 * Abra Kadabra
 * Danny Brickwell/Brick
 * Leonard Snart/Captain Cold
 * Matthew Hagen/Clayface
 * Ultra-Humanite
 * Hook
 * Ojo/Professor Ojo
 * Devastation
 * Crystal Frost/Killer Frost
 * Eric Needham/Black Spider
 * Cissie King-Jones/Arrowette
 * Diana/Diana Prince/Wonder Woman
 * Jay Garrick/Flash
 * Wesley Dodds/Sandman
 * Carter Hall/Hawkman
 * Kendra Saunders/Hawkgirl/Hawkwoman
 * Amanda Spence
 * Raquel Ervin/Rocket
 * Arnus/Augustus Freeman IV/Icon
 * Patrick "Eel" O'Brian/Plastic Man
 * Bruno "Ugly" Mannheim
 * Whisper A’Daire
 * Jack Haly
 * Raymond Jensen/Parasite
 * Noor Harjavti
 * Rumaan Harjavti
 * Vykin the Black
 * Beautiful Dreamer
 * Mark Moonrider/Moonrider
 * Serifan
 * Infinity-Man
 * Alan Scott/Green Lantern
 * Ra’s al Ghul
 * Blackbriar Thorn/Druid
 * Felix Faust
 * William I. Zard/Wizard
 * Serling Roquette
 * King Faraday
 * Lucas "Snapper" Carr
 * Rita Farr/Elasti-Girl
 * Jonathan Lord/Silverblade
 * Sandra Stanyon
 * Paul Sloane/Two-Face/Charlatan
 * Mercy Graves
 * Pieter Cross/Doctor Mid-Nite
 * Perdita
 * Mattie Harcourt
 * Richard Dragon
 * Dudley H. Dudley/Uncle Dudley
 * Mr. Tawky Tawny
 * Topo
 * Desaad
 * Byron Shelley/Fog
 * Joan Garrick

Season 2/Invasion

 * Jaime Reyes/Blue Beetle
 * Bart Allen/Impulse/Kid Flash
 * Despero
 * Tim Drake/Robin
 * Golden Roc
 * Wood-King
 * Stone-God
 * Crystal Creature
 * Fire-Lord
 * Glass-Man
 * Mercury Monster
 * Golem
 * Jefferson Pierce/Black Lightning
 * Mongul
 * G. Gordon Godfrey/Glorious Godfrey
 * Darkseid
 * Carol Ferris/Star Sapphire
 * Lobo
 * Black Beetle
 * Virgil Hawkins/Static
 * La'gaan/Lagoon Boy
 * Stephanie Brown/Robin/Spoiler
 * Cassie Sandsmark/Wonder Girl
 * Adam Strange
 * Alanna
 * Sardath
 * Asami Koizumi/Samurai
 * Eduardo "Ed" Dorado Jr./El Dorado
 * Tye Longshadow/Apache Chief
 * Nathaniel Tryon/Neutron
 * Dan Garrett/Blue Beetle
 * Ted Kord/Blue Beetle
 * Jason Todd/Robin/Red Hood
 * Jason Todd/Red Hood
 * Slade Wilson/Deathstroke
 * Ubu
 * Lian Nguyen-Harper
 * Burton Thompson

Season 3/Outsiders

 * Vic Stone/Cyborg
 * Gabrielle Doe/Halo
 * Violet Harper/Halo
 * Overlord
 * Dolphin
 * Wyynde
 * Harper Row/Bluebird
 * Brion Markov/Geo-Force
 * Mitchell Mayo/Condiment King
 * Wendy Jones/Windfall
 * Eddie Corliss
 * Thomas Tompkins
 * Tommi Tompkins
 * Antonia Rodriguez/Big Words
 * Gaby Gabrielli
 * Patrick Maguire/Scrapper
 * Tara Markov/Terra
 * Kate Kane/Batwoman
 * Digger Harkness/Captain Boomerang
 * Doctor Moon
 * Sandra Woo-San/Lady Shiva
 * Cassandra Savage
 * Scandal Savage
 * Ishtar
 * Zviad Baazovi/Bad Samaritan
 * Ralph Dibny/Elongated Man
 * Helena Sandsmark
 * Donna Troy/Wonder Girl/Troia
 * Henry Fyff
 * Helga Jace
 * Cairo DeFrey
 * Angel O’Day
 * Mist
 * Leslie Willis/Livewire
 * Richard Swift/Shade
 * Cassandra Cain/Batgirl/Orphan
 * Jervis Tetch/Mad Hatter
 * Forager
 * Mantis
 * Orion
 * Ma’alefa’ak J'onzz
 * Jaculi
 * Rex Mason/Metamorpho
 * Frederick DeLamb/Baron Bedlam
 * Lia Briggs/Looker
 * Simon Ecks/Doctor Double X
 * Ana von Furth/Plasma
 * Otto von Furth/Plasmus
 * Celia Windward/Jet
 * Leonard Smalls/Holocaust
 * Curt Metcalf/Hardware
 * Tatsu Yamashiro/Katana
 * Bea da Costa/Fire
 * Tora Olafsdotter/Ice
 * John Henry Irons/Steel
 * Traci Thurston/Traci 13
 * Eliza Harmon/Trajectory
 * Courtney Whitmore/Stargirl
 * Gretchen Goode/Granny Goodness
 * Gretchen Goode
 * Sebastian Cardona
 * Cisco Ramon/Vibe
 * Ron Evers
 * Silas Stone
 * Casey Klebba
 * Metron
 * Rhea Duncan
 * Evelyn Fox
 * Calvin Durham
 * Gregor Markov
 * Steve Dayton/Mento
 * Cliff Steele/Robotman
 * Valentina Vostok/Negative Woman
 * Larry Trainor/Negative Man
 * Rebis
 * Niles Caulder/Chief
 * Lashina
 * Big Barda
 * Gilotina
 * Henry Heywood/Commander Steel
 * Rick Flagg
 * Tod Donner
 * Allen Phaedon
 * Kalibak
 * Grayven
 * Highfather