(Screengrabs courtesy of DavetheUsher’s fabulous HD Playhthrough/Commentary. Click thumbnails to view full-sized images.)
Al Bhed NPCs
Note: “mainlander” and “islander” are never distinguished in-game. There’s lots of islanders on the mainland, but the “mainlander” npcs never come south of Luca, apart from one refugee on Besaid and one person leaving Kilika for the mainland (I’m not sure whether she was originally from Kilika or Luca, so I’ve filed her under both). I think you can see regional differences in clothing styles between the two groups.
Clergy & Warrior Monk NPCs
Blitz Teams NPCs
Surfed in? This gallery is part of the most complete transcript of Final Fantasy X on the web, including hidden cutscenes and missible dialog you’ve almost certainly never come across.