Karasawa Shirou, a former NEFT employee, was the founder and first director of F.L.A.G. until he became a Kanshu, possibly known as "Kanshu #20."
He was also the master of the Coffin Princess Ende and established F.L.A.G. solely to locate her. After finding Ende, Karasawa faked his death, but his body was severely damaged, leaving only his upper half intact. He was referred to as "The Source of the Infection" and was responsible for the events that transpired on Hatsumi Island.
In the end, Karasawa Shirou was defeated by Takao Ryuusei and ultimately killed by Tougo Kazama.










