Aurelia is an NPC in Xenoblade Chronicles 2. She is an Urayan who can be found at Royal Guard Barracks in the Kingdom of Uraya during the DLC Quest A Mercenary's Honor available as downloadable content, the New Quests Pack 3 of the Expansion Pass.
Aurelia's father, Bonard, was a mercenary comrade of Geoffili's, and died on duty. Len is Aurelia's fiance, having proposed during Beneath the Aurora.