Quasilycanthrope

Quasilycanthropes were individuals who resisted lycanthropy after being infected, due to the latent power of their bloodline, and developed limited shapeshifting abilities instead.

Description
Some humans or giants who had lycanthrope ancestors were indistinguishable from regular member from their race, until exposed to lycanthropy. If the creature infecting them was of the same kind as their ancestors, they resisted the lycanthropy and their latent traits emerged instead. For example, a quasiwerewolf would require a bite by a werewolf for its latent abilities to awaken.

Quasilycanthropes whose abilities awakened were tougher than before, and gained limited shapeshifting abilities closely linked to their associated animal. For example, a quasiwerewolf could grow shaggy hair and sharp canine teeth or change their eye color to those of a wolf, whereas a quasiweretiger could grow whiskers and a tail.