Takigawa Kotori

A girl who attends a school close to Makoto's house, who chooses to become his assistant after he helps her out of a rough situation. She has an unnaturally strong sixth sense, which allows her to see ghosts, though her abilities are still flawed compared to Makoto's. However, she can sense spirits near her, which is an ability that is wholly her own.
Kotori is a bright, cheerful individual with a smile that never fades, but is sometimes so straightforward that she confuses those around her. She sees Makoto as an older brother of sorts and is constantly concerned about his safety.