Who is Ensei Tankado from Digital Fortress and what is their importance?

Ensei Tankado was born crippled as a result of his mother's exposure to radiation during the attacks on Hiroshima, and he spent much of his early life vowing revenge against America. Shortly after he was born, Tankado's mother died of complications related to childbirth, and his father abandoned him because of his deformity. At the age of twelve, Tankado discovered he had an innate ability to work with computers and eventually earned a scholarship to Doshisha University where he was known as the "crippled genius."