Every story serves a function even supposing it's just to get your audience to laugh. Let the characters reveal themselves as they act and speak, just as people reveal themselves in life, and only mention information on their physical 10 unbelievable death story appearance when it's relevant to the story the central character is discovering that unique attribute at that special time.
Level 90 content played out in a series of daily quests - some factions with general story arcs that described just what they were up to and gave you a great idea of who these various organizations were, others with little in the way of explanation, like the August Celestials that will likely 10 unbelievable death story remain an enigmatic puzzle permanently.
In effect while writing the story in much the same we have to embrace the personality of the fundamental character, way an actor embraces the style of the character he's death story playing on stage. There's never any need to describe a character simply for the benefit of it. Like everything else in the story characterisation is just applicable insofar as it contributes to the storyline, and should be done through activity.