In the case of the Fifth Trumpet, it seems
evident that the 'star' represents a person-
ality, an evil one.

For it is a "star fallen from heaven". He has
the key of the bottomless pit, so he can let
lose a multitude of demon locusts.

A true angel may descend from heaven but
never 'falls from heaven'. Such a term refers
to one cast out of heaven. Satan's fall from
heaven in Luke 10:18, "And he said unto
them, I beheld Satan as lightning fall from
heaven."