Guardian

Guardians are automated machines created by the Alimbics. They appear in all of the areas of Metroid Prime Hunters. They have a large head that is vulnerable to head shots. Individual Guardians use a standard beam along with modified Affinity Weapons. A Guardian using an Affinity Weapon will be extremely vulnerable to the opposite weapon. They use fusion energy for power.

Logbook

Logbook entry from Metroid Prime Hunters: Guardian

Specifically designed to guard the Alimbic Order, these automatons are now programmed to serve in its absence. These intelligent androids often travel in packs, attacking with energy projectiles produced by three small fusion generators located in the cranium.