|Cost to train||Free|
- "Here are the Grunt Soldiers. They fight without fear and will cling to UMA. But they're not smart enough to do anything but fight. They can't dig and of course construction is a no-go. That is all I have to say about them."
- — Liam
Sending a Grunt Soldier to do construction will actually destroy the item being constructed. They also cannot dig.
One of the most important units in the game, the Grunt Soldier is free, can cling to UMA, and is very good in combat. They make up the majority of most parties in the game. It is strongly advised to replace them with Hardened Soldiers when they are unlocked.