Hitsugi (Blood type AB) is one of the founders of and rhythm guitarist of Nightmare. His real name is Ikari Mitsuo. He was born on March 5, 1982 in Tokyo, however grew up in Sendai. His favorite colors are Red, Pink, Black, Brown, and Khaki. His favorite artist is Kobukuro, and he was influenced by hide from X Japan. Hitsugi invited Yomi to join Nightmare.