Werewolves

Werewolves are unique creatures, completely human in every way, that is until a full moon. Then their human form alters, their hight, build, appearance. The get taller, stronger, faster, their senses sharpen, and the take the form of a massive wolf, able to walk on it's hind legs. They are territorial and very fierce opponents. Very few Werewolves can control themselves when in their wolf forms, but it isn't unheard of.

These exist equally on Earth and The Makai