Black Doom (ブラックドゥーム, Burakku Dūmu?) is the primary antagonist in Shadow the Hedgehog. He is the sinister leader of the Black Arms and the oldest member of his species. The Black Arms are Black Doom's own spawn and appear to operate with an insect-like hive intelligence, seemingly preventing any attempts to challenge Black Doom for leadership. He presents an almost religious front and shows little respect for humanity due to its sins against each other and the planet earth.

In fact, his philosophy is little more than egotistical justification for his own dark deeds. Following his return to earth in the present day, he wanted to enslave the humans and use them as food for him and his army, but met his defeat at the hands of Shadow the Hedgehog.