Terror Teacher (テロ先生, Tero-Sensei) is a highly powerful and famous professional hero who works for the planetary defense agency, stationed on planet earth. She is known for being the most extreme and strict teacher known to all mankind, and has earned the title of Greatest Teacher In The Universe (宇宙で最も偉大な教師, Uchu De Mottomo Idaina Kyoshi) due to her ability to submit, teach, and reform even the most unruly, hopeless, and most badly behaved students all around the globe, having already reformed thousands of young men and women who were previously considered unteachable, prevailing through her extreme, cruel and unnatural teaching methods.