Steelbeak is the Chief Agent of FOWL (the Fiendish Organization for World Larceny).
Not much is known canonically about Steelbeak's history before he joined FOWL, including how he came to have a beak made of metal. Time and time again his and FOWL's plots have been thwarted by Darkwing Duck, and somehow Steelbeak always manages to come back for more.
In addition to being a cunning and devious FOWL agent, Steelbeak is also a schmoozer and a womanizer. He presents himself with a lot of swagger and bravado, but when push comes to shove, he is always ready to save himself above all else. While Darkwing Duck is a huge thorn in his side, he has shown a remarkable ability to manipulate the caped crusader and pit him against other heroes rather than focusing on stopping the crime itself. (See “Tiff of the Titans”.) Steelbeak also finds himself on the disapproving end of High Command (FOWL's cryptic trio of head honchos) often, but he is generally able to grovel his way out of too much trouble. He treats his underlings, FOWL's eggmen and eggwomen, like the cowering, dim-witted peons they are, using them for his own gain and as avian shields.
There is currently one active Steelbeak player on Duckverse:
His most hated and irritating rival, Darkwing Duck constantly foils Steelbeak's schemes no matter how well planned or well-staffed with expendable Eggmen. Steelbeak takes pleasure in mocking the hero's name every chance he can get, with sneers like “Duncewing” and “Darkwing Doofus.” He is also annoyed by Darkwing's sidekick Launchpad McQuack and to some extent by Darkwing's redheaded tagalong, but his main focus is on getting Darkwing's goat.
In the episode “Cleanliness is Next to Badliness,” Steelbeak reluctantly joined forces with Ammonia Pine, another FOWL agent who is obsessed with sanitation. She develops an unfortunate crush on the rooster, which he rejects but has to pretend to return for the sake of the mission. She also gives him the nickname “Steelie,” which he loathes. It is not until the promise from High Command that they will be partners indefinitely that Steelbeak finally makes his true feelings known, and earns himself another adversary.
In the episode “Smarter Than a Speeding Bullet,” an alien gets lost on his way to the planet Mertz and ends up meeting the FOWL agent. Stating he is looking for a hero to train him, Steelbeak dresses up in a makeshift disguise and calls himself “Steelwing Cluck” in order to assume the role of hero trainer. Instead of doing any actual coaching, however, the rooster takes advantage of Comet Guy's naivete and slow-wittedness to get the alien to use his superpowers (namely his super strength and flight) for less-than-heroic deeds. Ultimately Darkwing intercedes and Comet Guy realizes he has been on the wrong side the entire time.
Steelbeak's trio of bosses who are the head of FOWL. They appear only on screen and in shadow to give him orders, check in on his progress, or to berate him depending on Darkwing Duck's level of interference.
In the episode “Tiff of the Titans,” Steelbeak pits Gizmoduck and Darkwing Duck against each other while he makes off with the Egret, a super-powered military vehicle that can be used on land and in the air. It is surprisingly easy to get the two heroes bickering, but eventually they figure out a way to work together to stop the rooster. Steelbeak is almost as annoyed by Gizmoduck as he is Darkwing. Almost.
In the episode “The Darkwing Squad,” Steelbeak approaches Chief Agent Gryzlikoff of SHUSH after the bear walks away from his job, believing that there is no place for him with the agency anymore. The rooster seemingly convinces Gryzlikoff to switch sides, however it ends up being a ruse to thwart Steelbeak's ultimate goal of stealing a giant pearl from the Saint Canard Aquarium.