The Third Neck (三の首, San no kubi?), he is one of the first Orochi to attack the Miko. He is a very large man with heavy chains hanging off him, which he uses as weapons. Girochi is said to be Miyako's younger brother.

Spoiler

He is attracted to Himeko and wishes to go on a date with her, which only fuels Chikane's jealous protectiveness of the Solar Miko.

(from wikipedia)