
He talks about the Au Ra first getting attacked the first time they Ishgardians, but says something along the lines of "They found out we don't die so easily." It implies (to me anyway!) that after the initial bits of skirmish, those hostilities stopped. I mean, Sidurgu hangs out in a bar in plain sight, so...
To answer another question regarding timelines: Ishgard was only covered in snow and ice after the Calamity. Prior to that (so 7~ years ago) it was lush green hills and slopes. And then ten years prior to that Ishgard closed their walls to outsiders. If you're looking to play a 20~ year old Au Ra, being attached to Ishgard is a fairly tricky scenario.
Edit, after reading the OP more closely:
Playing a non-Ishgardian Dark Knight is a bit of an oxymoron: Dark Knights appear to be what they are because of what they do, not how they do it. I admit this is just my interpretation of it, but the questlines focus more on the moral conflict and doing the right thing as defining points than opening up your ebil darknezz powarz. Those get plenty of attention from 30-50, but once you get to the Ishgardian part the tone shifts a lot.
So are you after the role specifically? Combating corruption and protecting the people of Ishgard from those who would manipulate them? That's perfectly noble as a profession, albeit an illegal one, but again that makes getting you into the city kind of difficult.
If you're just after the discipline and power set, you don't need to be a Dark Knight in title and recognition: You could just fight with a greatsword and tap those sorts of powers, too. If you wanted to have a Dark Knight mentor show her the ropes, that's easy enough with just a little elbow grease and creativity.
To answer another question regarding timelines: Ishgard was only covered in snow and ice after the Calamity. Prior to that (so 7~ years ago) it was lush green hills and slopes. And then ten years prior to that Ishgard closed their walls to outsiders. If you're looking to play a 20~ year old Au Ra, being attached to Ishgard is a fairly tricky scenario.
Edit, after reading the OP more closely:
Playing a non-Ishgardian Dark Knight is a bit of an oxymoron: Dark Knights appear to be what they are because of what they do, not how they do it. I admit this is just my interpretation of it, but the questlines focus more on the moral conflict and doing the right thing as defining points than opening up your ebil darknezz powarz. Those get plenty of attention from 30-50, but once you get to the Ishgardian part the tone shifts a lot.
So are you after the role specifically? Combating corruption and protecting the people of Ishgard from those who would manipulate them? That's perfectly noble as a profession, albeit an illegal one, but again that makes getting you into the city kind of difficult.
If you're just after the discipline and power set, you don't need to be a Dark Knight in title and recognition: You could just fight with a greatsword and tap those sorts of powers, too. If you wanted to have a Dark Knight mentor show her the ropes, that's easy enough with just a little elbow grease and creativity.