As we don't have details about the 'legend's end story', the main characters could be a wide variety of beings. It could be a wizard who has been a part of a magical legend for centuries and is now facing the end of his story, or it could be a group of adventurers who are witnesses or catalysts to the end of a well - known legend. Maybe it's a story about a cursed family whose final member is about to break the curse, making that person the main character in this 'legend's end story'.
Since I don't know the specific 'legend's end story', I can't say for sure who the main characters are. It could be heroes, villains, or even ordinary people caught up in extraordinary events related to the end of the legend.
There's no way to tell without more information about the 'legend's end story'. However, in a general sense, if it's about the end of a heroic legend, the main characters might include the hero themselves, their comrades, and perhaps the antagonist who they finally face off against at the end. Or it could be a story about a community's legend, in which case the main characters could be the elders or leaders of that community who play a role in the legend's conclusion.