In the 2005 film and graphic novel series, "Sin City", what was Kevin?

"Sin City" (also known as "Frank Miller's Sin City") is a 2005 American neo-noir crime anthology film written, produced, and directed by Frank Miller and Robert Rodriguez. It is based on Miller's graphic novel of the same name.

Kevin is a fictional character in Frank Miller's graphic novel series "Sin City", featured prominently in "The Hard Goodbye". He is a mute, cannibalistic serial killer who preys on the titular city's prostitutes, The Girls of Old Town. He is protected by the powerful Cardinal Patrick Henry Roark, who also acts as his accomplice. Kevin lives at the Roark family farm, and uses the basement as an execution chamber for his victims; after he kills and eats them, he stuffs and mounts their heads on the walls like hunting trophies.

Kevin is portrayed by Elijah Wood in Robert Rodriguez's 2005 film adaptation of "Sin City". In 2011, UGO Networks ranked Kevin together with Miho as #1 in their list "Quiet as the Grave: The Silent Killers of Film and TV".