A relative of Satō who had taken full custody of her after her parents died many years ago. There's a possible chance that she may have been killed by her own niece since she's rarely ever shown in person and is mostly shown in flashback sequences when Satō was a child. However, it's revealed that she is alive and healthy. Mentally unstable and deeply insane, she accepts desires, sex and violence towards her with disturbing masochistic pleasure, believing them to be love. Her deeply twisted views of love are responsible for making Satō the deranged psychopath that she is today.
Happy Sugar Life
This is a shivering pure love psycho horror story of a girl named Satou Matsuzaka, who has someone she likes. She experiences a sweet feeling when she sleeps with her, and thought it must be love. Everything will be forgiven as long as she protects this feeling, even if she tricks, commits crimes, steals, or even kills, she thought.
