Richard "Dick" Grayson, born December 1st, 1996) was the first Robin. The former protégé of Batman, Robin was a founding member of the Team. In season 2, Richard had become Nightwing and assumed the leadership role of the covert operations team while Aqualad was in deep cover, infiltrating the Light to learn more about their activities. When Aqualad completed that mission, Nightwing stepped down as leader. As Team leader, Nightwing acted as a mentor to the current Robin, Tim Drake.

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Kaldur'ahm (Atlantean Kαλδυρ'αμ) is the former protégé of Aquaman, operating as Aqualad by his king's side and as first leader of the team. He worked under deep cover as the loyal lieutenant of his father, Black Manta, to bring down the Light and their partner (The Reach). Following his extraction from the operation, he was reinstated as leader of the Team.

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Kid Flash (real name Wally West, November 11, 1994—June 20, 2016) was a founding member of the Team. He was the nephew and former sidekick of Barry Allen. Being the Flash's biggest fan, he begged his hero to let him become his sidekick. Barry refused, but that didn't stop Wally. He replicated the experiment that gave Barry his powers in his family's garage. He blew up the garage and ended up in the hospital. Barry felt guilty for leaving notes that Wally could work on. After he came out of the hospital, Wally manifested the powers he desired. Barry reluctantly agreed to let him become Kid Flash, but only if he did exactly as he said.

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Superboy (also known as Conner Kent and Kon-El, "born" March 21, 2010) is a genomorph, a hybrid clone of Superman and Lex Luthor, and a founding member of the Team. Superboy is a partial genetic clone of Superman, and as such shares many of Superman's physical traits. At the time of his liberation, Superboy was physiologically 16 years old; however, chronologically he was only 16 weeks old. As a side effect of the cloning process, Superboy will never visibly age, thus looks identical in the five years since his awakening. Superboy is a Caucasian male with short black hair and blue eyes. He is noticeably taller than most people of his physiological age and is quite muscular, likely due to his partial Kryptonian genes. He is considered very handsome by most girls in his physiological age group and is typically seen with a frown on his face, rarely with a smile.

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Miss Martian (real name M'gann M'orzz, alias Megan Morse) is a Martian and a member of the Team. She is the niece and former protégé of the Martian Manhunter. Additionally, she is the fifth member of the team which we consider to be a founding member. Miss Martian's true appearance is that of what most humans would consider a grotesque monster, with white skin, long limbs, and a hunchback. However, as a shape-shifter, she can model her appearance to her desire, which is usually that of a green-skinned female humanoid based on Marie Logan as a teenager, with amber eyes and shoulder-length red hair, though after five years, she now keeps her hair at a shorter length, but it has since grown longer over the months. She also has freckles on her cheeks.

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Artemis Crock is a member of the Team, originally under the name Artemis and later Tigress. A master archer, she is the former protégé of Green Arrow. She is the daughter of Sportsmaster and retired villain Huntress, and the younger sister of Cheshire. Artemis left the hero life behind with her boyfriend Wally West, but returned for an undercover mission. After staging her death, she joined Aqualad as his trusted lieutenant Tigress. She retained that name when she returned to the Team after Wally's death.

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