Hida Kaimetsu-Uo was the son of Hida Osano-Wo and half-brother of Hida Kenzan. When Osano-Wo declared that leadership of the Clan would pass to Kenzan, Kaimetsu-Uo's mother left Crab lands in outrage. She took Kaimetsu-Uo with her, and travelled to the Islands of Spice and Silk where Kaimetsu-Uo founded the Mantis Clan.