Another one that was *supposed* to be a drabble.
Olórin was counted wise, and he was wise enough to know to keep his misgivings about Fëanor to himself. The greatest of the Noldor was held in high esteem, even as he became prouder and more self-willed. He had the sneaking suspicion that the Valar felt slightly sorry for the young prince who had lost his mother, and Aulë was always praising his work.
But Olórin saw reflections of another in the Elda. Whenever he saw Fëanor, it was as if he saw the young Maia who had told him in all seriousness that he wanted to know everything, who had also once served Aulë. And seeing what his little brother had come too, Olórin didn't need Námo's prescience to know that for good or ill, Fëanor was going to change everything.
F.Y.I: In my universe, Olorin and Mairon/Sauron are brothers.