Question: is doom slayer a demon?
Answer: He is also known by the UAC as DM1-5, DOOM Marine or The Slayer, and by the Demons of Hell as the Doom Slayer, the Unchained Predator, the Beast or the Hell Walker. Depending on the version of the character, his real name or aliases include William Joseph "B.J" Blazkowicz and Flynn Taggart.