Heaven Canceler

Known to Touma as the "Frog-Faced Doctor," this brilliant physician possesses the miraculous ability to cure any ailment or fatal wound, though brain-related damage remains his sole limitation. Beyond his medical mastery, he played a pivotal role in helping Accelerator stabilize his powers through the Misaka Network. As a cornerstone of Academy City’s foundation, this genius also maintains the life-extending technology essential for the city's ruler, Aleister Crowley, making him an indispensable figure in the urban landscape.