The Denizens, often refferred to as the Elsen are the people who inhabit the world of OFF.
They are usually quite meek and easily upset, but also polite.
When they stress too much, their head explodes and they will attack the Batter.
Their behavior is a bit different between zones.

In Zone 1 they mostly seem to be afraid of Dedan and the Spectres, and they
care a great deal about rules and working hard.

In zone 2 they are unaware that a guardian is watching over them and they
are afraid of pretty much everything. They live in constant feat and shy away from anything they deem dangerous.

The Elsen in Zone 3 are a bit more relaxed, because Enoch told them the
spectres are friendly. They are also addicted to sugar and work hard
in order to receive it.
When they crave sugar, they become much more brave and aggressive.

There are a whole bunch of Elsen in the game, so multiple people were cast for this role. Sadly, one of them ended up being unable to finish their assigned lines.