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
224Please respect copyright.PENANAAkN6mEXZpH
Arbella224Please respect copyright.PENANAMATYvVMn8b
Filiny224Please respect copyright.PENANAhosuInXEec
Gatyk224Please respect copyright.PENANA2gEaJaA9TA