- VOICE RANGE: HIGH -

Satoshi is the older brother of Satoko. He is not present through the majority of the story, but is the initiator of many of the events that take place in his absence, namely the serial murders committed in several arcs. Satoshi is a quiet and soft-spoken person who is kind and seemingly calm, although he clearly worries about his younger sister and seems to get frustrated or discouraged rather easily, sometimes having trouble focusing. Their mother and step father died in an accident on the night of the Cotton Drifting festival. As such, Satoshi's aunt and uncle became their foster parents, but both Satoshi and Satoko were abused by them, though Satoshi often took the blows for his little sister. This is only revealed by Shion, as she was always concerned that while Satoshi didn't want to make a fuss, Satoko cried and got attention and sympathy, even though Satoshi was ill as a result of the abuse. He eventually murders his aunt, and runs from town, leaving Satoko and Shion behind.