There are many enemies in the series that will challenge Rion throughout his missions. In the first Galerians, they are Dorothy's underlings while in Galerians: Ash they are under Ash's command. In the sequel, they can re-spawn indefinitely and they will drop items and permanent stat boost enhancements (HP, AP, or PPEC) upon being defeated. In the first Galerians, enemies drop nothing and do not respawn but very rarely. They will be replaced by a different types of foe.
They all can be killed easily by shorting but defeating an enemy in Galerians: Ash while under the effects of a short will only reward the player half the amount of stat boosts. For example, if Rion kills an enemy while shorting and they drop a HP stat boost, he will get +5 HP instead of +10 HP.