Kihara Amata

Introduced in Volume 12 of the novels, he is a sadistic former scientist who is now the Commander of the Hound Dogs, Academy City's Black Ops force. He is the man who discovered Accelerator and his former guardian and teacher, whom the former constantly abused and trained the latter by subjecting him to various experiments that were design to kill him which left the other participants dead and extreme training to teach Accelerator how to use his powers properly. He reunites with his former student when the Hounds Dogs are ordered to kidnapped Last Order from Accelerator. Amata proves to be difficult opponent for Accelerator as the former manages to physically hit him repeatedly without being affected by the latter's powers as Amata understands how his powers work and even used it against him.