Now that Wali has deemed by wyvern riding skills acceptable, she's finally agreed to show me around the region.
From what I can gather, Wali has been here for a very long time, maybe longer than Rockwell was on the island. She knows the history of every village and ruin. Apparently there was once a great city to the southeast, but it was wiped out at some point.
She's still mum on a lot of details, but I'll just have to keep prying. Radar's been helpful in that regard. Wali definitely seems to be in a better mood when the fuzzball's around. That little charmer's certainly earned her keep.