Madoka Orimura, known by her alias, M , is one of the primary antagonists of the anime and novel series Infinite Stratos, and is the younger sister of Chifuyu and Ichika.
M was the one who raised the plan in Phantom Task to steal Byakushiki during IS Academy's anniversary. She was also responsible for a device called the 'Remover', that almost caused Ichika to lose his IS when he was fighting Autumn during the IS Academy school anniversary.
After invading and terrorizing the USA base to steal The Steal Gospel, she is intercepted and defeated by Natasha. After finally her revealing true identity to Ichika, she attempts to murder him, but Laura deviated the attack.