Sentouin Roku-gou

The man known as "Combat Agent Six" joined the Kisaragi Corporation in his first year of high school, roughly three to four years before the beginning of the story. He began working there part-time at age nineteen.

Six is a senior in the organization being the oldest member of the organization left except for the generals. That is why, when the company was on the verge of the global conquest, Six was one of the candidates to explore an alternate world similar to Earth in order to conquer it.

Six was eventually chosen, being sent to a alternate world in order to spy on it and prepare him for this world's domination at the hands of Kisaragi.