Werewolf

The werewolf was a supernatural creature that acted as a normal person by day and shapeshift into a humanoid wolf-form at night.

In Peccavi
Werewolves were cursed beings that invoked the anger of the moon goddess Yuzuki. They rarely had any recollection of their nightly activities, only that they were more tired than before they fell asleep. When morphed into the wolf-form, werewolves often hungered on relatives or enemies of the moon goddess in a frenzied state.