Question: do other races (mainly the longer-lived ones such as elves) mature more slowly than humans in this setting?
I ask because I've had Denri graduate at the age of 168 under the assumption that he is in mid-adolesence at this time and was mentally too young to go to school previously (as I assume is the case with all elves).
GojiBean
Good question.
For the first twenty-ish years of life, Elves and other long-lived species age about the same as humans do. But once in their early-mid twenties, they stop aging all but entirely until they're about 80% through their life span. They will very, very slowly put on a few signs, like by age 750 a female Elf will look like a woman in her mid 30's. But it's SUPER slow. And again, proper aging effects don't kick in until they're about 80% through their life span.