Observer

This scout unit has an advanced cloaking device which makes it nigh impossible to spot and is believed to keep the Illuminate civilization under tight watch.

These suppressing drones are also used on the battlefield to scout out enemy resistance, to which point they can teleport their more heavily armored warriors.

Tactics
Predominately found on low to medium level planets, Observers patrol the battlefield while cloaked, following semi-random patterns while searching for Helldivers. Their patrols are more densely clustered around mission objectives and they are also attracted to Stratagem beacons.

After spotting Helldiver troops, Observers will de-cloak and quickly raise an alarm to call for support from more powerful Illuminate units. As Observers have no offensive capabilities they normally re-activate their cloaking system after raising an alarm and seek to avoid conflict.

A melee attack or single shot from any conventional weapon can very easily destroy Observers, however, their cloaking ability and small size means Helldivers must be alert and accurate when fighting Illuminate forces.