He is the patron deity of Rigel and is worshiped as the War Father, but becomes denounced as a Fell God by some of the characters because of his descent into madness.

Is Duma an angel?

Duma is an angel, based upon the figure of silence in the Kabbalah, first appearing in The Sandman: Season of Mists.

Who was the angel of madness?

From Library Journal. The "angels of madness" are the voices that Mark Berger, a manic depressive, heard during his manic episodes. They also represent the emotional upheaval his family experienced when they learned of his illness.