Azrael is an alias used by multiple fictional characters appearing in American comic books published by DC Comics. The original version, Jean-Paul Valley, was created by Denny O'Neil, Joe Quesada, and Peter Milligan, and debuted in Batman: Sword of Azrael #1. The second character to assume the alias was Michael Washington Lane, in Azrael: Death's Dark Knight #1. Both iterations are Christian vigilantes and assassins created by the Order of St. Dumas and/or its derivatives, secretive religious organizations seeking to restore justice to Gotham City through religious extremism. They are typically portrayed as antiheroes and reluctant allies of the superhero Batman and the Batman Family, battling forms of manipulations employed by their respective orders, violent tendencies shaped by tragedies in their life, and proving themselves trusted allies to Batman.

Joseph Quesada is an American comic book artist, writer, editor, and television producer. He became known in the 1990s for his work on various Valiant Comics books, such as Ninjak and Solar, Man of the Atom. He later worked on numerous books for DC Comics and Marvel Comics, such as Batman: Sword of Azrael and X-Factor, before forming his own company, Event Comics, where he published his creator-owned character, Ash.