Seine Miyazaki

A girl that is over 300 years of age. She gained immortality by the help of a demon and posses an ability to take out the evil inside a person by taking out "mushi." She posed as a normal student in Tsugawa's school to find people with "mushi". She said that she's done this several times in different places. She has a huge hatred for mermaids ever since she witnessed them devouring her father figure, Shion the magician (previous holder of Aion).