Tuor and Idril

[Gorthol]

Tuor was counted among the Eldar, which means he must have been given the gift/curse of immortality. If that is true, then Iluvatar must have given it to him. But it was probably Manwe who made it possible, since he alone knows Iluvatar's deepest thoughts. Remember, when Earendil's fate is decided, Manwe takes charge and allows him to freely choose. If he could do that to earendil, why not Tuor?

Tuor was counted among the "Elder Children" and thus he got the "gift" of immortality, Ilúvatar was certainly the one who decided this, probably through the request of Ulmo through Manwë. Since Tuor was brought up by elves, brought to the world to deliver the message to Turgon, loved the elves and finally faught with great honor to help them out, it is understandable that he was (as a unique exception) counted among their numbers and was to share their fate. Eärendils fate was not the same as Tuors, Eärendil had the free choice of belonging to either race, Tuor did not, but was instead granted this "gift" through the deepest wishes of his heart, i.e. he was an Elf in every respect but the fact born a man..