Have you sworn you've seen a shadow or a wolf in the corner of your eye but turn to look back and it vanished, or you have smelt the earthly smell of dying leaves or the rotting of meat upon flesh, but you swear there isn't any carcasses around?
Yin is a dark ghostly figure who takes the lives of wolves who deserves it, or their time is simply up. Yang keeps her in check, make sure no wolves face the wrath of her temper and die too early. Yin can feel the hostility in wolves and when a fight breaks out she is always watching a distances away.
On occasion, Wolves who didn't deserve to die, get killed on accident or purpose. Having compassion, she helps guide them and she wouldn't admit it but her heart softens to see pups dying for no good reason. Getting (totally not begging) Yang to revive them, to restore their love and soul- though they are never perfect or how they were before.
If you can evade Yin's gaze and aura feeling you can watch her playing and entertaining the puppies, a soft smile lacing her face.