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
127Please respect copyright.PENANAx1nNk5ZrTN
Arbella127Please respect copyright.PENANAYobmfiLUuV
Filiny127Please respect copyright.PENANAbOEpvl3NXl
Gatyk127Please respect copyright.PENANAsRbSkXrdxV