Megumi Amatsuka is the main character and protagonist of the story. She is a fiftten year old student at the Furinkan high school.
Megumi was originally a boy until the age of 9 before being transformed into a girl by a little demon, Pierrot.
Her name is Megumi which is a feminine name. According to her story, it´s still a boy's name before a transformation by the little demon. In real world, Megumi is one of Japanese female names.
According to Fujiki during a conversation with Miki, Megumi is more feminine than a normal girl.
She is called Angel by pepole in city and many male students at high school, Meg in English version (or Megu in Japanese version) and Princess or Megu-chan by Genzou.