Lycanthrope

A lycanthrope is a person affected by a magical condition. They are first mentioned in Fool Moon.

Description
Unlike the other various forms of werewolf, a lycanthrope is not a theriomorph. Physically human, they are indistinguishable from a regular person, at least on the surface. They are also unique in that they are born this way, and not made. A lycanthrope acts as a natural channel for a spirit of rage, which makes them beast-like, but only psychologically, so that they have "the minds and souls of beasts.". Driven by the spirit, they are more aggressive, stronger, and resistant to disease and injury; wounds heal very quickly, enabling them to survive much more physical damage than a typical human being.

Fool Moon
In Fool Moon, a gang of lycanthropes known as the Streetwolves, are implicated, among others, in the Lobo Murders. Harry Dresden is nudged to investigate them at the Full Moon Garage by freckly, red-headed Roger Harris of the FBI. Dresden barely escape alive. Later they kidnap Dresden—he barely escapes the Streetwolves, Marcone and the FBI hexenwolves with the aid of Tera West and the Alphas.