Seiko is a girl in high school who performed the Sachiko Ever After Charm with several others and was stuck in Heavenly Host Elementary School. Unfortunately, she is going to be stuck in that horrid palce forever. I say that becuse she and Naomi got into a fight. They separtated, but when Seiko left, Naomi was possesed, and dragged her friend to the bathroom. There she hung her own friend. This happened in the anime, game, and manga. Poor Seiko.