Nurikabe

Nurikabe is a large sleepyeyed wallshaped ykai who uses his massive size to protect Kitaro and his friends. The original Nurikabe is a spirit which blocks the passage of people walking at night. Nurikabe first appears in a cameo as one of many ykai attending a sukiyaki party in the story A Walk to Hell Rental version before making a more prominent appearance in The Great Ykai War Shnen Magazine version. In the 2002 Kodansha International Bilingual Comics edition he is referred to as Wally Wall.