GRIN (Ground Ranger with Inteface Network) Is a one-of-a-kind prototype that is capable of speech and thought on human level. She is used for stealth missions such as kidnappings, assassinations and info gathering via persons.

GROWL (Ground Ranger with Offensive Weapons Loadout) is a mass-produced model that runs on a simpler combat-focused AI, though other variations exist that are capable of stealth, but can only be used alongside a human soldier.

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