Draighean

Once a prisoner in eternal night, Draighean met Ragnarök during his first foray into the moonlight lands. The shadow she was then attached herself to him and pleaded and bargained until he agreed to free her, promising her unknown crimes were far in the past and that she would never pose a threat to his pack.

She attached her soul to a strangle, glowing amulet that Ragnarök found between his paws as he woke up. It allows her to piggyback off any wolf wearing it around their neck. Pyet briefly agreed to carry it, grudgingly sharing his body with the obnoxiously-enthusiastic, easily-distracted she-wolf.

Then a dark she-wolf named Poplar came to the pack, exhausted, wounded, and without her previous pack. She took on the duty of carrying Draighean eagerly, happy to take a backseat for a few moons while her body healed under Draighean's care and her mind rested peacefully.

Draighean's goal is for Poplar to bear pups while wearing the amulet, ultimately allowing her to reincarnate her soul into one of the newly created body. What she'll do once in full control of a body is up to anyone's guess.