>>84250030The Underworld in her lore feels like a mess. Which it is because it's a mashup of many ideas. There are wastelands where I'm sure inhabitants are bored (and hunted by beasts), ethereal plains that give glimpses to the Overworld, hotspring and mountains resorts, also some pretty bopping clubs and cities.
Mori rose to her rank through beating others and proving her own skills. in the past she was a formidable foe who felled human, monster, and opposing reaper without remorse...but she's changed. Finding her kinder side. Enough that Death basically dopes side with her now, recognizing that reapers can have friends (and even bend things from time-to-time.) In older times it was probably much more rigid, but our Mori broke the mold and reapers taught by her in more recent times could share similar views.