Shouichi Makise

Shouichi Makise publicly known as Dr. Nakabachi, was a scientist researching in the field of time-travelling. He is later revealed to be the father (and attempted killer) of Kurisu Makise and is one of the main antagonists of Steins Gates.

Plot
In the original timeline, he kills Kurisu, steals her work and he causes World War III. Rintarou Okabe accidentally prevents his plans after sending the first D-Mail.