Lucifer

"You are the best, Dante. Many have tried and many have failed me. Brave Ulysses, the great Alexander, Attila, Lancelot... Only you possessed a soul black enough to free me." Lucifer, Dante's Inferno.

Lucifer is the main antagonist in Dante's Inferno.

Characteristics
Lucifer is the ruler of Hell and is imprisoned in Lake Cocytus. Lucifer used to be one of God's most trusted angels in Heaven until Lucifer led a failed rebellion, after this he was sent to Hell. During his banishment, Lucifer became a twisted creature with horns and spikes all over his body, his lower torso replaced with a goats legs.

Centuries have passed and Lucifer has tried countless heroes to free him from Hell so he can retake Heaven. He has stated that Alexander the Great, Attila the Hun, Lancelot and others have tried and failed to free him. Dante is tricked into entering Hell, with Dante trying to save his fiance while Lucifer's true intentions was to use Dante to break his shackles.