Memories
The most basic monster of the Machine type, these sphere-like devices aren't very strong and can be easily wiped out, but that doesn't offset that fact that they are quite annoying enemies: its attacks are Psychokinesis, which inflicts Sick on a party member as well as a single hit of damage; Shock Wave, which hits a party member three times and causes Stun, and finally, a Jamming attack called Voice of Rage. Once they have activated this last attack, which they tend to do right at the start of the battle they are encountered in, the player's Reyvateils won't be able to activate their Song Magic at will and instead will have to wait until their MP runs out, causing the Song to explode and lose part of its strength. Therefore, it's advisable to kill these enemies first in order to undo the Jamming.