Once, Kamimura was an employee at the Japanese game company FromSoftware. Then a war began, and he and a few others died. They woke up in a game they worked on, Armored Core MoA. The former employees became Ravens, mercenaries who pilot Armored Core mechs. His AC, Speed Demon, is a gray lightweight two-legged AC equipped with a stealth weapon that takes up both back slots, a hand gun, and the MOONLIGHT laser blade, which has appeared in most FromSoft games. He is rank 6 in the Fromsoft Arena.