Menoumaru Hyouga  

Lord Hyouga

Menomaru, a demon from China, tries to invade Japan and faces opposition from Inuyasha's father. Despite not appearing in the manga or anime, he becomes the main antagonist in "InuYasha Toki wo Koeru Omoi." Although Menomaru is defeated by Hyoga two centuries ago, his spirit is revived through the Shikon shard after it breaks into pieces.