Her personality is almost the exact opposite of Ichika's. She is cold-blooded, quiet, and prideful, always looking down on almost everybody but doesn't say it out loud. So far in the Light Novel series, she only has one goal and that is to kill Chifuyu Orimura, and on occasions she plans to also kill Ichika Orimura.
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 