Werewolf

A Werewolf is a mythological human who becomes a wolf under the light of a full moon. A werewolf has yet to appear in Destined. It is unknown if they actually exist, though the only werewolf ever seen would be the main antagonist in Kill It Before It Dies, who chased Billy Appleby and Sally Mae (the protagonists of the film).

Direct Mentions
Piper Halliwell was once turned into a Wendigo, which Phoebe later mistook as a werewolf. She later described a wendigo to Paige as "like a werewolf, only meaner".

Whilst under the magical influence of the Blue Moon, the original Charmed Ones once transformed into Blue Moon Beasts similar to how werewolves would transform under a full moon.