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
215Please respect copyright.PENANAd66TSAxqsX
Arbella215Please respect copyright.PENANADgul0ALqGm
Filiny215Please respect copyright.PENANA9Dk623nBMx
Gatyk215Please respect copyright.PENANA4XIAUw3nUz