Tetsuhiro Shigemura

Tetsuhiro is a professor of Electrical and Electronic Engineering at the Toto Institute of Technology, where he had established his Shigemura Laboratory that was attended by students such as Kayaba Akihiko, Sugou Nobuyuki, and Higa Takeru. Shigemura Tetsuhiro was also an external board member at Argus, the company that created Sword Art Online

After the death of his daughter Shigemura Yuuna in Sword Art Online, Tetsuhiro developed the Augma, Ordinal Scale, and YUNA at Kamura as part of a plan to resurrect his daughter as an artificial intelligence (AI) by gathering memories of her stolen from Sword Art Online survivors. The plan would have culminated in a mass high-output scanning of Sword Art Online player brains during YUNA's first concert at the New National Stadium, but it was thwarted by the artificial intelligence reproduction of his daughter, who decided to sacrifice herself to save the players from potential death due to the scan.

In the aftermath of the incident, the professor resigned from Kamura,relinquished his rights to the YUNA AI, and was introduced to Project Alicization at Rath by Kikuoka Seijirou.