Everyone knows Batman as the Dark Knight who strikes terror into the hearts of criminals in Gotham City, but in the Justice League we discover another facet of this mysterious caped crusader. Not only is Batman the world's greatest detective, but he also has one of the greatest scientific and analytical minds on Earth. Although he has no superpowers of his own, Batman is often the key to Justice League victories.

Backed by Bruce Wayne's vast personal fortune and the scientific resources of Wayne Enterprises, Batman has access to all kinds of weapons and technology, from prototype hyperdrive vehicles to deep-space bat suits. But Batman is uncomfortable in the glare of the public spotlight. He prefers to work alone in the shadows, only joining a Justice League operation when absolutely necessary. When he does commit to helping the League, he brings to it the same fierce determination that he does to his own crusades against crime. Batman's grim attitude often rubs his teammates the wrong way, but he earns their respect with his unwavering dedication to justice.

John Stewart is a veteran member of the elite Green Lantern Corps, an intergalactic peacekeeping force founded by the Guardians of Oa. The Guardians provide each Green Lantern with a power ring that must be recharged every 24 hours from a lantern-like power source. Acting as the ultimate defensive weapon, the ring responds to mere thought and can project powerful laser-like beams or impenetrable force fields. Its emerald aura also protects the wearer from the harsh environs of deep space. Years ago, the Guardians of Oa recognized John Stewart's potential for exceptional courage and heroism. Awarding him a power ring, they trained him to be the Green Lantern for Sector 2814, a quadrant of the galaxy that includes our own solar system. For more than ten years, John has patrolled the deepest reaches of space. Now, he has returned home to protect Earth as a member of the Justice League. Unfortunately, the hard-nosed military attitude that makes John an ideal Green Lantern often creates friction with his fellow Justice Leaguers. Because he views himself as an authorized professional peacekeeper, he sometimes treats the others like well-meaning amateurs.

Wonder Woman was born Diana, Princess of Themyscira. The daughter of Hippolyta, Diana was blessed by the gods with amazing speed and strength. She also possesses the power of flight, silver bracelets that can deflect bullets, and an indestructible golden lasso spun from the girdle of the Earth Goddess Gaea. Diana was raised among a fabled race of Amazons who trained her to be the ultimate Amazon warrior. Now, for the first time, she has ventured out into Man's world. Her sheltered existence on Themyscira hardly prepared her for the greed, cruelty and oppression that she finds among the human race. Accustomed to being treated like royalty, Wonder Woman has the aristocratic bearing of a goddess. With her deep sense of honor, she is easily offended when she is not accorded the respect that she feels she deserves, and she does not suffer fools gladly. Yet beneath this imposing exterior, she has a sly sense of humor.

Living up to being the legendary Superman would be a burden for most men, but Clark Kent's shoulders are more than broad enough to carry the load. While his incredible physical strength comes from his home planet of Krypton, his moral strength comes from his simple Kansas upbringing. But he's no longer the farm boy from Smallville. After seeing more of the universe than any of us can imagine, he maintains a firm sense of right and wrong. he is more complex than his reputation as a big blue Boy Scout. When he talks about Truth, Justice and Freedom, everyone senses his deep commitment to these ideals. The natural leader of the Justice League, Superman leads by example and steadies this volatile group. With so many super-egos involved, there are often major clashes in style. And when clashes inevitably occur, he is often the peacemaker.

Young, brash and impulsive, Wally West gained the power of super-speed during a freak electro-chemical accident. Now the fastest man alive, he can run at velocities approaching the speed of light. Even Superman has a hard time keeping up with him. Because of his super-fast metabolism, Wally is constantly hungry. Also blessed with a quick wit, Wally takes a light-hearted view of saving the universe. He is the comedian of the group, a wise-cracking, easy going slacker who relies on speed, not brains, to get him out of trouble. Unfortunately, this doesn't always work, and his flippant attitude annoys his teammates who take their jobs far more seriously. Often, this over-reliance on speed will get him in over his head, and his teammates will have to catch up to rescue him. For them, there is one thing the Flash cannot do fast enough - grow up.

J'Onn J'Onzz is the last survivor of an ancient Martian race. He is a telepath who can use his uncanny shape-shifting abilities to adapt and blend into any situation. By altering his physical density, he can also become immaterial and pass through solid objects. Because he comes from a cold barren planet, exposure to intense heat can weaken him. J'Onzz came to Earth to warn us of an invasion by the evil race that wiped out his own people on Mars. Although he was met with suspicion and hostility, J'Onzz refused to give up, and helped to gather together a group of heroes who could repel the invaders. This group would become the Justice League. After the invaders were defeated, J'Onzz remained on Earth because as the last of his kind, he no longer had a home. The other members of the Justice League try to make him feel welcome, but he always remains aloof, detached and inscrutable. As an outside observer, J'Onzz is fascinated by contradictions of the human race. When he secretly walks among us, he is overwhelmed by the conflict between intellect and emotion he senses within every one of us. Often, it is too much for his alien mind to absorb, so he retreats to the orbiting Justice League Watchtower, where he spends most of his time. Although he is the heart of the Justice League, no one in the universe is more alone than J'Onn J'Onzz.

Shayera Hol was an undercover detective on her native planet of Thanagar. Several years ago, while pursuing some criminals who were trafficking in forbidden technology, she was zapped by a dimensional transport beam. Her molecular structure was ripped apart and sent halfway across the galaxy. When she awoke, she found herself on an uncharted planet called Earth. Using her survival training, she adopted a human identity and learned to blend in with the native population. Although Shayera hopes to return to Thanagar someday, she has developed a strong bond with the people of Earth. As Hawkgirl, she uses her Thanagarian powers to serve and protect her adopted home. Hawkgirl has the power of flight, lethal hand-to-hand combat skills and the ability to communicate with birds.