Chase Meridian

The superhero Batman has appeared in American comic books published by DC Comics since 1939, accumulating a number of recognizable supporting characters. The first Batman supporting character was Commissioner James Gordon, who first appeared in the same comic book as Batman in Detective Comics #27 (May 1939), and is Batman's ally in the Gotham City Police Department. Robin, Batman's vigilante partner, was introduced in the Spring of 1940, Alfred Pennyworth, Batman's butler, was introduced in 1943, and Barbara Gordon was introduced in 1967. Batman also forms strong bonds or close working relationships with other superheroes, including Justice League members Superman, Green Arrow and Zatanna, as well as members of the Outsiders superhero team. Others such as Jason Bard, Harold, Onyx, and Toyman work for him.

In addition, Batman has perhaps the most well known adversaries in fiction, commonly referred to as Batman's rogues gallery, which includes the Joker, Penguin, and Two-Face, among others.

The GCPD were featured in their own series: the limited series Batman: GCPD and the ongoing series Gotham Central, in which they investigate the unusual crimes that plague the city, in a personal effort to minimize Batman's involvement.Gotham Central series ended its 40 issue run in 2006.

...
Wikipedia