Satoko was a villager betrothed to Kazumi. She was kidnapped and killed by the Swamp Demon. Satoko was a young girl with black hair, parted at her forehead with short bangs framing her face. Her hair was partially tied with a large, dark pink ribbon on the back of her head. Satoko wore a magenta-and-white-patterned kimono tied with a mauve-colored obi and zōri. Before she was kidnapped, she was seen carrying a decorated pouch. Not much is known about Satoko's personality, but it appears she had a cheerful attitude seen when she pleasantly laughed while talking with her fiancé.