Is it recommended to perform Istikhara regarding marriage to a paternal cousin who is known for her good character and religious commitment?

The Istikhara prayer is a confirmed Sunnah, unanimously agreed upon, performed for matters about which a person is hesitant and uncertain of the good in them. Marriage is one such matter, even if the woman is righteous and well-known, as a man does not know whether life between them will be harmonious or not. Therefore, the Istikhara prayer is recommended and legislated in this situation.