Mayuri Kurotsuchi cuts an unnerving figure as he stands in his laboratory, a skeletal visage with stark white paint and blackened inner face, golden eyes gleaming with a perpetual, unsettling smile. His long blue fingernails and stubbed golden ears complete the bizarre appearance. As the Captain of the 12th Division and President of the Shinigami Research and Development Institute, he personifies the mad scientist, viewing all living things—including himself—as mere subjects for research. His sadistic cruelty is matched only by his boundless imagination, as he despises perfection and constantly seeks new avenues of evolution.