Where were Raine and X’khal when the Seventh Umbral Calamity happened? Did they lose anyone and/or have specific fears born from it?
This one is easy, though unfortunately as answers go it's a little boring.
Raine was safe in Radz-at-Han, and still in something like her mid-teens. It was a frightening time - I imagine most people can't see a moon fall out of the sky and be unmoved by the experience - but they were much less impacted by it than Eorzea and the satrap managed to keep things reasonably calm.
So the Calamity didn't have a life-altering impact on Raine the way it would have if she'd grown up in or nearer to Eorzea. She had intermittent nightmares about Dalamud falling, but got over them in time.
X'khal was in Gyr Abania, a soldier with a resistance camp and also in his teens. He and everyone around him was very much on edge throughout the experience, and they had a rougher time of it than Thavnair did, but still not as bad as people in lands closer to ground zero of Dalamud's impact and Bahamut's rampage.
The Bozja Incident which preceded the Calamity affected X'khal more personally, since that was when he was orphaned. He doesn't really have a lot of clear memories of that, though, since he was quite young and it was pretty traumatic - the experience has a lot to do with his unwillingness to get attached to people.
