This dangerous skeleton character skull smiling with its upper teeth exposed is a black and white illustration in a manga by Tsutomu Nihei, featuring a grotesque, robotic head. The head is large and angular, with a prominent, hollowed-out eye socket on the right side, and a small, circular eye on the left. The head has a metallic texture, indicated by the smooth, reflective surface and sharp edges. The eye socket on the right side is empty, creating a stark contrast with the small, circular eye on the left, which appears to be a simple, mechanical eye. The top of the head has a large, rectangular plate with Japanese characters inscribed on it, adding a sense of technological advancement or identification. The overall design is stark and unsettling, with a focus on the robotic nature of the head and its lack of human features. The background is completely black, which makes the character stand out sharply. The illustration uses heavy, bold lines to emphasize the mechanical and inhuman aspects of the character, enhancing the sense of coldness and alienation.