Takeyama (竹山, Takeyama) is an intelligent young man who is good at hacking computers. He wrote the "Briefing Manager" program that Yuri uses to brief the SSS prior to the mission. He insists everyone call him by his username "Christ", although everyone still calls him by his real name and he is usually ignored or interrupted by others. He tries to execute all plans as perfectly as possible. He does not engage in combat or any other physical operations, but rather gathers data and information.