>>279686664
There's a huge experience gap between Nayuta and Makima obviously, and Makima had probably scanned the minds of a huge number of people to obtain their memories.
Even so, Nayuta came in equipped with pretty much the average Devil personality and she could be far more eloquent than your average school kid when describing devil behavior, just like Yoru is.
Devils at their base just seem to very selfish, arrogant towards humans, hedonistic and lacking in social skills.
We've seen more than a few Devils respawn by now and they aren't necessarily what would be regarded as "children".