Wolf yōkai are demons who resemble wolves. The ones that have a humanoid appearance have fangs and pointed ears, and the ones that aren't humanoid look like wolves slightly larger than the regular wolf, and have the ability to speak. They are almost always seen wearing armor and wolf fur. They live in large groups, and inhabit caves in mountain areas. Wolf demons usually never have any sort of demonic power, and attack with weapons or physical strength. They can control actual wolves to do their bidding. They also hunt all animals, including humans except for Kōga's group.
For the wolf yōkai the own pack is very important. Kōga was the main reason for the hunt for Naraku, that Kagura had killed so many members of his pack. And Kai is annoyed when he thinks Kōga would have left his pack in the lurch.
Wolf yōkai also often have a coat color, which corresponds to their pack. The wolves in Kōga's packs have light brown fur. A friendly pack, which is later attacked by Kagura, had black fur. And the wolves in Ayames Rudel have white or ocher fur.
Their strength also seems to vary. Kōga and Ayame are quite strong, but most of the wolf yōkai seem to be rather weak. Some are killed even by "lower yōkai" which looks like huge worms and beetles, although Hanyō like Inuyasha and Jinenji can easily destroy them.
- Many fans assume that wolf yōkai can change their shape, and that the wolf yōkai look like big wolves also have a human-like shape, while Kōga and other human-like wolf yōkai can look like huge animals. However, one has never seen such a transformation in either the manga or the anime.