Life has been a real rollercoaster lately for Pretty Little Liars fans, but there's no need to panic just yet. There was that big A reveal, and the five-year time jump, and of course, all the rumors about when the show will end.
Definition of xenial : of, relating to, or constituting hospitality or relations between host and guest and especially among the ancient Greeks between persons of different cities xenial relationship
1 Xenia may have been a member of the black arm gang as referenced by her incomplete memory in Nomads Elegy.  Xenia is also the name of the Greek concept of hospitality, or generosity and courtesy shown to those who are far from home. This is ironic, considering how she actually treats the player and a few NPCs.