It wasn’t spirituality. Their faces were filled with the “light of The Eldar”. It was a visible difference. One knew when they were talking an elf. They were also more slender than humans.
Now what the hell having the light of Earendil or whatever actually *looked* like is totally up to interpretation. Perhaps it was more cyberpunk than angelic! Lol
All right, so they have a wicked tanning routine. Now we know why they're so eager to sail westward.