Tsutomu Nihei
From Halopedia, the Halo wiki
Tsutomu Nihei (born 1971) is a Japanese manga artist. He is relatively unknown outside Japan, though his cyberpunk-influenced artwork has gained a strong cult following.
He has produced everything from erotic manga to the BLAME! series. He was responsible for both the art and the story for the section of the Halo Graphic Novel called "Breaking Qurantine: The untold story of Sergeant Johnson's escape from the Flood.
