Leaving the pack as an adult as she was displeased at the state of the pack under Zeni Onan's rule, she discovered many things about the difficulties of leadership in the Twilight Guardian pack and believed herself fit to rule the pack after the experience. She confronted Zeni upon her return, pushing him about his relative lack of leadership in his later years and through this learned that he had fallen into dark arts with evil witches.
Jusinet, much like her fore mother from where her name was gotten, did not want bloodshed for her pack, but it was clear that many were leaving in under Zeni. She gradually gathered wolves behind her cause to allow her to be leader, campaigning and working with wolves in and out of the pack. Before Zeni new it, more wolves were on Jusinet's side than his and he was forced to step down as leader.
Jusinet IV was the very first Ascendant with no access to Lunar Magic, something that was a struggle but was alleviated minimally when she became lead and could visit the Land Ruled by the Moon.