Raidship

Gigantic flying object over 200 meters in length.
What appear to be the bow and aft sides are symmetric in appearance, but the center area has a different design on the left　and right sides: giant creatures are released from the circular side, and ravagers from the triangular side.
For this reason, this is believed to be the enemies' transport ship, but because it releases Aggressors heavier than the Raidship　itself, it is believed that rather than being "physically transported," the enemies are being teleported in from somewhere else.

The Raidship itself also has the ability to teleport, suddenly appearing in the sky over a country, but disappearing just as soon, foiling any attempts by the EDF to deliver coordinated attacks or ambushes. The EDF must always resort to being on the defensive when one appears.

Raidships have an extremely durable exterior, and cannot be destroyed by attacks from personal-use weapons.
The Raidships are equipped with weapons of their own, so it is dangerous to remain stationary while attacking them.