Shion is one of the 13 Demon Generals known for both using seishoujutsu and surviving using it multiple times, thus making her one of the most dangerous Magatsu in existence. That said, at heart she is a tsundere who desperately wants to connect with others. She acts in an arrogant manner and generally assumes that she is the most powerful person in any relationship, but she is mostly treated as a mascot by her classmates. She is a master of spellcraft, particularly specializing in injutsu (the art of curses and using opponents' power against them). Born from the despair of a woman who was falsely accused of adultery by her husband before being killed, she awakened to the 'Jinshiki' seishoujutsu which encourages evolution and strengthening of Magatsu. For a long time, she went around spreading slaughter by making various Magatsu for reasons she herself didn't understand, until she encountered the founder of the Isurugi line. It was then that she was 'betrayed' and sealed by the founder, who desperately wanted her to awaken in an era where she could find happiness.