Yamabiko

They were raising a Yamabiko at Okutama, resembling monkeys and prone to maniacal laughter while using the fog to cover their abductions, killing the victim and using their voices to feed the Yamabiko. While Douji was destroyed by Hibiki's Onibidume, Hime fell to Hibiki's Onibi, though their child was able to fend for itself by then. Another pair were among the victims devoured by Midaredouji in episode 13.