The Jarl of Morthal is a little eccentric. She sees visions and the people think she is crazy. Yet when J’Zhirr speaks to her, she seems perfectly sane although rather removed from the affairs of her people, like a wise man who observes world events from the top of his ivory tower.
It is likely that she has a bit of magical talent in her but this is not a good thing in Skyrim. The Nords have always been distrustful of magic, now even more so after the Oblivion Crisis.