Lilith

"Don't let them kill me, Nathaniel."

-Lilith to Nathaniel

Lilith was a powerful white-eyed demon and the first demon Lucifer created, as well as being the final seal of the 66 Seals that had to be broken for him to be freed from his cage. She was trapped in Hell until May 2007, when she escaped and effortlessly defeated multiple rival demons to take over the deceased Azazel's former position as leader of the army of demons that he had unleashed alongside her. Lilith led this army on Earth and commanded the rest of the forces of Hell in the War of the Seals against the Host of Heaven. She was responsible for the destruction of sixty-six seals guarding Lucifer's cage in 2008, ending with Raziel killing her and freeing Lucifer.] In the demonic hierarchy of Hell she, as the original demon, ranked highest of all, beyond Alastair, The Knights of Hell, Cain, and even The Princes of Hell, outranked only by Lucifer himself.

History
Lilith