Diligence Class Drone
Diligence Class Drones are Luminoth built mechanoids found only in Sanctuary Fortress on Aether. These units were originally designed for cleaning, but were modified for combat once the war began and eventually out-classed by Harmony Class Drones. They are similar to the Scatter Bombus on Tallon IV.
- "The Diligence Class Drones were the first cleaning united designed by the Luminoth. They were modified for combat duty once the war began but were outshined by the newer Harmony-Class Units. A Diligence uses focused beams to perform its duty. Their energy construct makes them invulnerable to most attacks, though dark energy can disrupt them." — Logbook "Diligence Class Drone" (Metroid Prime 2: Echoes)