The Elves had Urria, but they lost him as they did some terrible stuff and kicked out of paradise. Apparently Urria lead warriors from another race (Aquirs?) to them and the Auld Tree for some reason but they killed them and Urria turned away from the elves.
They are lost since but time to time in historic moments certain Elves - died ages ago, saints and martyrs - return to them and give help, direction and inspiration. These dudes/grills are called Kalahoras and their priests are the Keepers. In Sirenar they only acknowledge three but in Elfendel they follow seven. Krán has many but one main, who was created by Ranagol himself, he mixed his own saliva, sweat and blood with the blood of Elves picked from outside of Krán, then exhaled his own spirit into the mass. Also there's one Kalahora who is honored by everyone, a hero of the Aquir-Elf War (I think from the Second Era), called Mallior whose descendants are still living... in Krán.
Funny thing: the Elves of Krán call all the outsider Elves "Lost Ones". I don't know if it's intentional by the part of the authors, but there are serious implications that Ranagol and Urria is the same entity which would be quite ironic as the Elves find Ranagol and his cult gruesome but totally understandable as they didn't understand Urria in the first place.
Elves are usually tragic heroes, maybe even melodramatic. They also proud folks and feel superior to everyone. Elves of Krán are the same but squared. Btw their culture was fashioned after not just the Tolkienesque Elves but North American Indians.
Half-elves are even more lost than Elves themselves as they are excluded (in most cases) both from the Elven and Human communities. But that would make them fine material for adventurers.
In Krán Obsidian Elves live, sometimes are called Dark Elves I think, they aren't Elves really but a subspecies of the Aquirs.