The creator of Error and Turbine. A different person from the Doctor at the Techno Experimental Workshop. Black hair swept back. Has a disheveled appearance. Dark circles under his eyes. Thick eyebrows. Large double-lidded eyes and a high-bridged nose. Quite handsome. A frequent smoker.

A humanoid robot who looks exactly like Dr. Hirasawa. Admires Dr. Hirasawa. Always exhausted because Turbine is so loud. Uses polite language with Dr. Hirasawa but is blunt with everyone else.

A copy of Dr. Hirasawa's personality and memories. Lives in virtual space. Has shark-like jagged teeth.