How to Craft Gray-0 Mecha Workers in Crimson Desert

In Crimson Desert, to craft Gray-0 Mecha Workers, you must first reach Chapter 10 and liberate Marnie's Steel Armory. Then, head to Dewhaven Keep, meet Heinrik, and complete some simple tasks. Collect Chaya, and once everything is done, these robotic buddies will be ready to work for you!