Takeyama

Takeyama is the SSS's hacker and programmer, having personally written the briefing software Yuri Nakamura uses ahead of every operation. Short, bespectacled, and sporting a distinctive bowl haircut, he insists on being addressed by his own chosen alias, though most of his comrades keep calling him by his real name anyway.

He stays out of combat entirely, focusing instead on gathering and analyzing data — one of the few members of the group who fights the war from behind a screen rather than on the front line.