Unlike Mad Demons they neither have a big body build or strong arms, nor they wear animal skins or armors. They wear a colorful rainbow-like cope of unknown material, underneath it Sylvie could see something swarming and wriggling like numerous vipers.
Their heads are bigger than those of regular Mad Demons, yet, their eyes and noses were not distinctive. Their faces looked like two big scars, with red furrows and ridges extending from the center.
Fearsome Demons can cause fear strong enough that ordinary man would be incapable to fight. Witches could avoid it as long as they don't look into eyes. The effect could be weakened with God's Stone of Retaliation.