DEFENDERS:

Hellcat
An honorary Avenger and Defender, Patsy Walker possesses no superhuman powers, but her agility is incredible.

Black Knight
A descendant of the original Black Knight, Dane Whitman possesses the Ebony Blade and once served as a member and leader of the Avengers. Recently, he has been known to appear and vanish frequently, apparently going between our time and the past uncontrollably.

Daredevil
As a child Matt Murdock saved a blind man from a truck...And in turn, lost his own sight. An experimental isotope carried by the truck blinded him, at the same time enhacing his other senses to superhuman extents as well as giving him a type of radar. A lawyer by night, the protector of Hell's Kitchen by day, he is a man with the heart of an angel...And the horns of a devil..
ALICE'S WONDERLAND

Alice
Something has been stalking people --- Heroes and citizens alike. Resembling a tall, pale, thin man with darkly outlined eyes and a black top hat, this force engulfs others with its darkness for reasons as yet unknown...

Hulk
Dr. Bruce Banner was caught in a gamma bomb explosion which transformed him into the Hulk, a behemoth with incredible strength and invulnerability, as well as fast regenerative abilities.

Doctor Strange
A former surgeon, Doctor Stephen Strange is the Sorcerer Supreme. With his mystical abilities, he possesses various connections to different spiritual entities.

Namor the Sub-Mariner
The ruler of Atlantis, Namor McKenzie is a mutant who can breathe underwater, fly, and possesses incredible strength. Although once an enemy of humanity, Namor has also served as its protector as a member of the Invaders, Avengers, and Defenders.

Luke Cage
Formerly known as Power Man, Luke Cage possesses steel-hard skin and incredible strength. He was most-recently a member of the Heroes for Hire.
HELL:

Hellstorm
The proclaimed Son of Satan, Daimon Hellstrom he was once a hero, a Defender. Now, he has almost completely indulged his demonic side, only to be called back from the darkness on occassion by his former lover: Patsy Walker, the Defender Hellcat.
ELSEWHERE

Valkyrie
One of Odin's warrior women, the Valkyrie, Brunnhilde possesses superhuman strength and virtual immortality.
GUEST-STARRING

Black Widow
Natasha Romanov began on the side of communism. As the Black Widow she worked for her homeland Russia during the Cold War against America. However, the years have brought her wisdom and a place among the heroes, as well as relationships with the Avengers and more intimately, Daredevil.

Iceman
One of the original X-Men, as well as a former Defender and Champion, Bobby Drake has the mutant ability to convert his body to ice, and to control sub-zero temperatures. He's recently left the presence of the X-Men for a simpler life.

Nighthawk
Wealth, power, and friends have always been important to Kyle Richmond. He worked with the Defenders for many years as Nighthawk, with his night-based strength. But after dying and coming back, and accepting Mephisto's offering of tainted new eyes, he's not the same man. No longer wealthy, and with undefined demonic influences from his new sight, Kyle has reluctantly rejoined the Defenders and found himself surprisingly enjoying it.

Hawkeye
A reformed criminal and longtime Avenger, Clint Barton posseses no superhuman powers, but his archery skills are unmatched. Armed with a variety of trick arrows, Hawkeye has also served as leader of the West Coast Avengers. After leading the Thunderbolts for a brief period, he had a falling out with them and returned to the Avengers.

Man-Thing
The scientist Ted Sallis became an empathic, mindless Man-Thing when he was forced to drink his own chemical. Living in the Florida swamps, he leads a singular life after being appointed guardian of the Nexus of All Realities, the crossing point of all places in existence, by unknown forces.