Urth

[Mysteltain]

From what I've gathered of Urth, she seems to have been an Allagan queen (or perhaps Amdapori, given the proximity of Urth's Gift to Amdapor Township and Keep), who she was slain by Odin and, after killing her, he was soon defeated by one of Allag's champions and sealed away in the Shroud. When the Calamity occurred, it weakened the seal on the crystal containing him and he managed to escape.

Admittedly, most of what we know of her this old queen is through Odin, but he does say something interesting should you lose the FATE:

Odin: Urth... One day, I will find thee...

The emphasis in that sentence tells me that either he believes Urth is alive (perhaps he's unaware of the passage of time?), or that she never died in the first place--perhaps both. Was he exacting some form of retribution upon her in the past? Was she a cruel ruler that he felt justified in killing? Until we get some more quests surrounding Odin, or someone from the Community Team fills us in on the Lore, we're pretty well in the dark on this.