Ghost Wolf is one of the seven children of Bigby and Snow White. Unlike the rest of his siblings, he was born a zephyr, meaning that he is invisible and unknown to everyone except his family and a few others.
His birth unknown to everyone, he unintentionally caused a series of murders in Fabletown and the Farm, by taking their air out. Eventually he managed to find his way back to his mother. The mother and son shared an emotional but brief reunion as she was forced to urge him to flee out of fear of being discovered and then killed by his grandfather, the North Wind.
She urged him to go and find his father Bigby.
He eventually managed to find his father and stayed with him during his exile. He aided his father during his mission into the Homelands. When his father reunited with Snow White, he shared a happy reunion with his mother.