Harukawa Eisuke

Japanese name:

春川 英輔,

He is a neurologist and computer scientist at Sakuba University. He is the creator of HAL and the Electronic (Denshi) Drug. After finding out that the Electronic Drug had been used by HAL on hundreds of people rather than his two selected test subjects, he was killed by HAL's three supercomputer guardians.
SpoilerThe reason behind creating HAL was so that he could recreate a patient of his, who was slowly losing her self from a mysterious brain disease.

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