Computer Research Society President (コンピュータ研究会部長)

He has a passion for computers and has, with the other four members of the Computer Society, developed their own basic science-fiction strategy game titled The Day of Sagittarius III (there is no Day of Sagittarius I or II, they just thought the III would sound cool). He later challenges the SOS Brigade to a rigged contest using their game, betting four of his club's laptops in an attempt to reclaim the originally pilfered computer. Despite the Research Society's cheating, Yuki counters by reprogramming the code in-match, and the SOS Brigade wins. Despite the loss of four additional laptops, the President was at least overjoyed at having discovered a genius computer hacker that would participate in his club's activities. In the light novels, it is hinted he is one of Nagato's secret admirers.

From Wikipedia