The series launched with a core group of seven Legionnaires plus Superman. Eight more (who were already Legionnaires) were introduced gradually during Season One. Five new Legionnaires were inducted during the Season One. Season Two (which skips ahead in time) featured the formal addition of seven more, plus a handful of new nonspeaking members.
Only Legionnaires who actually appearanced as members are included in this list. In the opening sequence, many Legionnaires symbols appear — including a number who never actually appear in the cartoon.
After the three founders, it's unspecified what order the Legionnaires joined. Six Legionnaires appear onscreen but have no speaking roles.
The heroes' real names are listed only if they were named in the series.
» SEE ALSO: Legion Gallery
|Name (Aliases)||First Appearance (In-Episode)||Series Status|
|1.||Cosmic Boy (Rokk Krinn)||S01.E11||Featured|
|1.||Saturn Girl (Imra Ardeen)||S01.E01||Featured|
|1.||Lightning Lad (Garth Ranzz)||S01.E01||Featured|
|First Round Inductees|
|Bouncing Boy (Chuck Taine)||S01.E01||Featured|
|Phantom Girl (Tinya Wazzo)||Featured|
|Triplicate Girl (Luornu Durgo, Duo Damsel)||Featured|
|Brainiac 5 (Querl Dox)||S01.E01||Featured|
|15.||Superman (Clark Kent, Kal-El)||S01.E01||Featured|
|16.||Timber Wolf (Brin Londo)||S01.E02||Featured|
|17.||Matter-Eater Lad (Tenzil Kem)||Appeared S01.E05; joined S01.E09||Supporting|
|19.||Ferro Lad||S0S01.EE11||Deceased S01.E12|
|23.||Ultra Boy (Jo Nah)||Appeared S01.E05; joined <S02.E13||Supporting|
|28.||White Witch (Mysa)||< Legion in 31st Century #18||Supporting|
|The Legion of Substitute Heroes|
|Chlorophyll Kid||Appeared S01.E08; formed the Subs S01.E09||Active with the Substitute Heroes|
|Unnamed heroes: Antennae Lad, Double Header, Fire Lad, The Mess, Night Girl, Polar Boy, Polecat, Quake Kid, Storm Boy||S01.E08||Unknown|
|The Light Speed Vanguard (LSV)|
|Esper||S01.E08||Active in villainy|
|The Hunter||Active in villainy|
|Ronn Karr||Active in villainy|
|Lightning Lord (Mekt Ranzz)||Active in villainy|
|Tyr||Active in villainy|
|Wave (aka Spider Girl)||Active in villainy|