12th Division Captain Kurotsuchi Mayuri:

The epitome of a mad scientist, and hence perfect for the job of Twelfth Division Captain. Mayuri paints himself black and white, wears a strange hat, and has altered his body to grant it many strange abilities. His main goal appears to be pursuit of forbidden knowledge at any cost, and he does not hesitate to resort to sadistic or underhanded methods to achieve his ends. Life means nothing to him; he would turn his own men into living bombs if it meant he could do or learn something more easily.