The Diablo series is well known for its dark gothic atmosphere and its status as the premier loot-grinding RPG, but it also boasts a good deal of lore. Some of it is historical, detailing the world of Sanctuary and its creation, while some of it tells the story of each game and its antagonists. Throughout this lore, some characters have made their mark on the series, and would be welcome additions to upcoming Diablo 4, its details still largely unknown.