"They must need help, and they need us for help them" Batman to the JLI.Young Justice is a team of young superheroes who assembled by the justice league international.
After they got abducted by the faceless hunter, 12 teenagers became metahumans, but they were afraid to use their powers and needed help (rise of the arsenal!). they got help from red tornado who trained them, when batman discover that Equinox plan to find the 11th fractual, he call them, tornado and fire to stop him (Young justice). after that, they welcome two new members: the new robin (tim drake) and Bushmaster (Vixen vs canary).
After the team help batman and the JLI beating equinox, they decide continue the team's activities, even adding new heroes to the roster: Citizen Steel, Steel, The Ray, Orphan, Supergirl and Red Sta, plus the reformed criminals Clayface and Killer Frost (Enter the new generation). But when the team failed in a mission who got finish with runaway of the legion of doom, the first generation of young superheroes: the Teen Titans decide that the team need to learn from them, causing a fight between them (Battle of proteges).
- Jade (Jennifer Lynn-Hayden)
- Gypsy (Cynthia Reynolds)
- Bumblebee (Karen Beecher)
- Element Girl (Urania Blackwell)
- Mr. Morality (Brian Den)
- Longshadow (Lloyd Red Crow)
- Green Lantern (Kyle Rayner)
- Phantasm (Daniel Chase)
- Herald (Mal Duncan)
- Jesse Quick (Jessie Chambers)
- Lori Lemaris
- Mr. Terrific (Michael Holt)
- Bushmaster (Bernal Rojas): Join after the team formation.
- Robin (Tim Drake): Join after the team formation.
- Citizen Steel (Nate Heywood): Join in the second induction.
- Steel (Natasha Irons): Join in the second induction.
- Ray (Raymond C. Terrill): Join in the second induction.
- Orphan (Cassandra Cain): Join in the second induction.
- Supergirl (Kara zor-el/Kara Kent): Join in the second induction.
- Red Star (Leonid Kovar): Join in the second induction.
- Miss Martian (Megan Morse): Join in the second induction.
- Sand (Sandy Hawkins)
- Obsidian (Todd Rice)
- Clayface (Basil Karlo): Join in the second induction.
- Killer Frost (Caitlin Snow): Join in the second induction.
- Justice League International: the people behind the young justice project by assembling them.
- Red Tornado: the trainer and mentor of the team.