a dark japanese robot warrior with mechanisms and pipes on the neck, an open mouth and sharp fangs. a close-up mechanical samurai

army asia background bust chest close cyber cyborg dark death demon face fang fangs future graphic gray grunge head helmet his horns horror illustration isolated japan japanese katana katanas mecha mechanical mechanism mechanisms metal monochrome mouth neck open outline pattern pipe pipes reactor robot samurai scary sharp sign soldier style sword symbol symmetry tattoo technology terrible two warrior mask