Doctor Ashura

Doctor Ashura is a member of Armed Brain Army Volt and an antagonist in Choujuu Sentai Liveman.

History
Ashura was originally a gangster named Arashi Busujima, known for being tough-as-nails and having a grudge against the Science Academia for being smarter than he is. After one of his men was converted into an Apeman by Hihi Zuno, Ashura tracks him down and uses the Zuno Beast to commit crimes, later coming into conflict with Falcon Red. Impressed by Ashura holding his own against Falcon Red, Great Professor Bias recruits Ashura into Volt and increases his intelligence to the level of a super genius, as well as modifies him to be a lot stronger.

Eventually though, Bias decides Ashura is an unworthy candidate to complete the Giga Brain Wave and revokes his super intelligence before casting him out. Now back to his original form, Arashi finds and befriends the Fiveman and Goh. He later straps dynamite to himself to make a suicide run on Battle Zuno, succeeding in destroying it at the cost of his own life.

After his death, Bias implies to Kemp and Mazenda that the only reason he recruited Ashura into Volt was to make them try harder.