In most cases, 'El Rey' is not based on actual events. It's more of a fictional narrative crafted for entertainment purposes. The plot and characters might be inspired by various elements but not by real-life happenings.
Since I don't know the exact 'el rey based on a true story', I can only guess. It could be that 'el rey' was a historical or contemporary figure. If it's a historical account, it might detail the political, social or cultural environment of the time. For example, if he was a king in a certain era, it could tell about the wars he fought, the alliances he made, and how he influenced the development of his kingdom. It could also explore his personal life, his family, and his beliefs.
Well, aside from Anos Voldigoad, there are some significant characters. Misha Necron, for example. She has a special connection with Anos and her character development is quite interesting throughout the story. Sasha Necron is another one. She is strong - willed and her actions often influence the plot. They both interact with Anos in different ways, sometimes as allies, sometimes with a bit of conflict due to their different views, which makes the story more engaging.