Satoshi is a teenager with average height and light build. He has short light brown hair and light brown eyes. He wears a white shirt (a part of the Kisaragi Academy uniform) with another blue shirt under it, gray pants and white shoes with blue soles.
Satoshi is kindhearted by nature, often willing to go the extra mile for those he cares for. Ironically, Satoshi is also a bit of a coward, and was highly reluctant to take part in the ritual that placed him and his peers at Heavenly Host Elementary School. A bit of a blockhead, Satoshi is blissfully unaware of the crushes multiple girls in his group of peers have for him, which never sees further development as everyone becomes more preoccupied with surviving the horrors of Heavenly Host. Despite the grotesque environment and macabre events that occur within Heavenly Host, Satoshi somehow finds the courage inside himself to push forward for the sake and safety of those important to him, such as his younger sister Yuka. His relationships between him and his younger sister Yuka mirroring the relationships between Kristoff and Anna from Frozen.
- In the Corpse Party: Book of Shadows Character Contest, Satoshi ranked 10th place.