The Unggoy (Latin, Monachus frigus) are a species of subordinate warriors in the unified conglomerate races of the Covenant. The Humans have termed such warriors Grunts, because of their speech patterns and their status in Covenant society.

Grunts are the lowest-ranked species of the Covenant, forming the bottom-most of all the castes. They are often pressed into combat and manual labor, although they are typically poor and overall cowardly warriors. They are physically diminutive, wear minimal armor, and most of them are tactically inept and are poor shots. However, what they lack in ability they make up for with sheer ...