French inventor and aeronaut who pilots the expedition's dirigible, the Hyperion. He gets temporarily separated from the group but returns to rescue them from killer whales at the Whale's Graveyard before the final departure.
Wealthy patron hires inventor to lead the journey.
Inventor and guide collaborate to navigate the harsh terrain.
Pilot faces direct hostility from the island's leader.
Inventor and local ally coordinate their escape route.
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