I messed around with a character maker and attempted to make the characters in the Book of Human. It's not completely accurate but I think it conveys the general idea of their appearance.
Armun
124Please respect copyright.PENANAfULRqilpNx
Arbella124Please respect copyright.PENANA3WBhcUMOhb
Filiny124Please respect copyright.PENANAveVzT3iC3m
Gatyk124Please respect copyright.PENANA07tGqjOtM6