Larran is a non-player character found north-east of the Chaos Temple by his small chest.
If players speak to him while wearing a ghostspeak amulet, they will learn that he was once a wealthy merchant who stored his possessions in a small and big chest in the Wilderness, where he believed few would attempt to open them. However, he was killed by Krystilia and several pirates. The pirates then hauled his big chest to a ship near the Pirates' Hideout, leaving behind the small one.
He will also explain how players can acquire the keys to open his chests, though he admits that he is surprised Krystilia herself did not try to loot his possessions.