The Idra (アイドラ Aidora?) is Rodochroun's humanoid Trion Warrior. It has shielding abilities and specializes in group combat. The soldiers are capable of combining their shields to increase their durability. They can also create smaller versions on their forearms. Offensively, they can sprout blades from the back of their hands and shoulders and fire beams from their mouth. An Idra can be remotely controlled by a Manual Mode user.
Rodochroun supplies Idras to Galopoula to compensate for their lack of Neighbor combatants. Galopoula sends them in waves to draw Border's attention to the outside.