Hallow found herself in the pack after many moons of travel. Rowan immediately brough her to Seer to decide her fate. When Seer performed the ceremony, she saw the day Hallow was born: Halloween. She also saw Hollow playing and caring for the pups of the pack. Seer had a very good feeling about Hallow and thus she was formally invited into the pack.
Shortly after her arrival, she went into heat. Due to a mistrust of male wolves, Hallow figured she would suffer through it. That's when Rowan told her about Erastus, the breeding male of the pack. Erastus was very kind and decided it best that they get to know each other first. Shortly before her heat was over, Hallow decided that she would like to give being a mother again a try.