Lucifer

A normal killer by birth, born with the name Brained he was burdened to become a deadly killer, gaining a reputation for killing during autumn. He gains the name given to him just like his father before him The Autumn Killer. Besides being a Killer he had a normal life, eventually as Braidens friends get more fascinated with the Autumn Killer they how they're smarts, hes forced to kill them all, however one i beyond his comprehension and is a legendary being known only to few as plague.

Plague looses due to his lack of memory and backs down Years later devising a death trap killing Braiden.

Braiden wakes up in hell, tearing every demon to shreds becoming the owner of the 9th circle of hell

desperate for they're fight against the anti-Christ Plague suggests to Doc (Plagues Brother) and HkR (A being beyond fabric and time) to summon Lucifer. The Summoning works, revealing that This was Plagues and Lucifer's plan. To get revenge on everyone.