According to this Elf who must be from Canaan Moore, the carriage Ian saw when he killed the Sharp Claw Tiger was his property, and the coachman was an employee from Nauman City.
He originally planned to come to South Ridge, delve into the Bison Mountain Range, and travel to the autonomous region to conduct a cultural investigation of the Mountain People. Unexpectedly, he hadn't even crossed the Indigo Mountain Gorge Entrance, which was theoretically 'quite safe,' when he was attacked by a Sharp Claw Tiger around the Agate Stone Plains. He fled alone in a panic, lamentably, the coachman and the carriage were lost at first encounter.
Magical Beasts generally wouldn't specifically target non-Sublimators, ordinary humans, for food; after all, human flesh is truly scarce and, at that time, most ordinary people didn't have much fat. It would take more effort to gnaw on their bones than to just eat a few Camel Beasts instead.