Raziel is is an archangel within the teachings of Jewish mysticism Who is the keeper of secrets.
A part from the song circle by slipknot:
"I can't be afraid of my patience
There's a sacred place Raziel keeps safe"
Raziel is a main character from the Legacy of Kain series. He appears in three out of five of them. Raziel was a vampire rised by Kain as his first lieutenant but later he became an wraith that feeds on souls.
Raziel the protagonist in the games Legacy of Kain: Soul Reaver, Legacy of Kain: Soul Reaver 2 and Legacy of Kain: Defiance