Hatsuko Shigemori comes from a family of ten brothers and sisters (including herself and her brother Keiji). As children, her brother and herself were often forgotten by people, even relatives. This would show itself in odd situations, such as people being able to recognise if Hatsuko and Keiji were missing but unable to remember who was missing. Hatsuko and her brother were also able to sense other people's true moods easily and eventually decided to utilise these abilities to their advantage.