Doctor Onishi

Doctor Onishi, usually known only as the Doctor, is the head scientist of the secret psychic research project who also serves as the Colonel's scientific advisor. He belonged to the second generation of scientists overseeing the project after Akira killed the last. It is his curiosity and negligence for anyone's well-being that unlocks and nurtures Tetsuo's destructive power in the first place.

(Source: Akira Wikia)