Given that Akursius Keep was once a land of Winterveil, the strongest Kingdom in Bronze Sea. But compare the size to Ravenna. if would be unlikely that the island was once like that. But if you think about it. Nero's Sea Curse probably powerful enough to obliterated majority island while leaving some land to create fort over the remain of it.
Sarlovèzenote Iron Legs mentor in Harvest Island wears wolf pelt and mentioned that he was an assassin. Wolf bandits on Wind-row island are implied to be former Assassin as there was an Assassin Syndicate banner lying on the ruins. Judging from this information, It could've speculated that he was a wolf bandit who is still sane and decide to leave Wind-row island because of how insane the wolf bandits are.
If The player didn't prevent Iris from melting Frostmill Island, She would completely destroy the island and leaving it citizens have nowhere to live. Even if she stated that she doesn't have anything against them.
