Some information here contains minor spoilers so read at your own risk.

«Human ranks»

] Commoner

] Baron

] Viscount

] Earl

] Marquess

] Duke

] King

] Emperor

] god

(god is not the highest rank, to humans god is high but to the true gods ( True god is a rank ) gods are like minor gods to them

Beast are monsters that have a chance of dropping a beast artifact, i will explain more in the series but people in the early stage tend to foucus on a certain element of beast artfacts so when they get there holy body there beast artfacts can combine easier.