Marie is actually a portion of the goddess Izanami-no-Mikoto, who was separated into four beings in ancient times. After regaining her memories, she attempted to commit suicide by erasing both herself and everyone's memories of her from existence. However, she was stopped by the Investigation Team and returned to Inaba. After the other parts of Izanami-no-Mikoto are defeated, Marie becomes whole again and gains some control over the weather. She has since taken a job in Inaba as a weather forecaster.
"That's why...! That's why I left! Because there's no point in seeing you...! We'll just hurt each other! ...It's okay. It's all okay. I've already made enough memories of my own... Fun... Happy... Memories... If you're not going to leave now, then I'll have to make you leave by force. Please, just understand..."
—Marie to the Investigation Team in the Hollow Forest
