Batman is the vigilante protector of Gotham City and patriarch of the Batman Family. Having witnessed the murder of his parents as a boy, he began a crusade against crime in Gotham as its "Dark Knight". He is one of the world's greatest detectives and most practiced crimefighters, with a plan or gadget for the most unthinkable of problems. He is also known for his strict code against lethal force and large cast of allies.

Richard Grayson is the adoptive son of Bruce Wayne. Trained by the Dark Knight himself, Grayson eventually became Batman's sidekick, the first Robin. Afterwards, he graduated to the role of Nightwing, donning a new costume.

Jason Todd is Red Hood, a vigilante anti-hero who is a member of the Batman Family and the Outlaws. Jason became the second Robin after Richard Grayson became Nightwing. Jason was trained by Bruce, and was his ward and partner until his death at the hands of the Joker. He was resurrected by Talia al Ghul using the Lazarus Pit.

Tim Drake is Bruce Wayne's third adopted son and the third Robin, becoming Robin after the death of Jason Todd. After being replaced as Robin by Damian Wayne, Tim became the vigilante Red Robin.

Damian Wayne is the son of Batman and Talia al Ghul. He is the fifth vigilante known as Robin and operates as Batman's primary crime fighting partner.

Cassandra Cain is one of the world's greatest martial artists, and a vigilante of the Bat Family. She was trained to be the perfect assassin. Eventually, she was adopted by Batman and became Batgirl after Barbara Gordon.

Stephanie Brown is a street vigilante who operates in Gotham City as a member of the Batman Family and the Batgirls. She succeeded Tim Drake and became Robin before being fired. Afterwards, she once more became Spoiler.

Barbara Gordon is both the Gotham City vigilante known as Batgirl and the computer hacker known as the Oracle, though she mostly goes by Oracle due to getting paralysed from the waist down. She is the daughter of Commissioner James Gordon.

Alfred Pennyworth is the polite, kind, and loyal butler to the Wayne family. After the Waynes' demise, Alfred continued to raise Bruce who later became Batman. He assists Bruce, and acts as a father figure to him, and the Bat Family.

Duke Thomas is The Signal, the teenage metahuman vigilante and daylight protector of Gotham. His parents lost of their sanity due to the Joker. Eventually, Duke was offered to train under Batman and join his family officially.