Ashley Monroe was a recent college graduate who majored in philosophy. She returned to Black Forest, Colorado, where she worked as a driver for Uber. At some point in time, she becomes possessed by the newly resurrected Lilith, who claimed to have only chosen Ashley because she had the nicest hair of the three potential meatsuits

Lilith was an extremely powerful white-eyed demon and the very 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 the undisputed King of Hell and leader of the vast 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 her allowing Sam Winchester to kill her and freeing Lucifer in 2009. In the demonic hierarchy of Hell, she, as the original demon, ranked highest of all (beyond Alastair, The Knights of Hell, Cain, and the Princes of Hell), and was outranked only by Lucifer himself Lilith was originally one of the early humans.

God demanded that angels bow to humans and love them more than him, but the archangel Lucifer refused because he saw humans as unworthy, for which he was cast from Heaven. Trying to prove to God that he was right about humanity's flaws, Lucifer "twisted and tempted" Lilith's soul into a demon.

As Lilith had been Lucifer's first demon, she was also made into the 66th seal; thus, if she died after 65 of the seals had been broken, her death would set Lucifer free

Lilith is currently possessing a human Vessel named Ashley Monroe a high school girl and has blonde hair and a white schoolgirl suit and orange tie and and blue skirt and white skin and blue eyes and she is om a School