Baron Ashura (Ashura Danshaku) is a fictional character featuring in the works of mangaka Go Nagai. He is the main henchman of Dr. Hell, the antagonist of Super Robot series Mazinger Z. He plagues the hero Kouji Kabuto for much of the series' run, until finally being killed in one of the later episodes.

He is notable for being voiced by two simultaneous seiyuu (long before the gimmick was made famous by Dragonball Z's fusion characters like Gogeta and Gotenks) as well as being a disturbing half-man, half-woman combination. Mazinger's most persistent enemy, he makes regular appearances in the Super Robot Wars series as Dr. Hell's loyal underling.