Unggoy

The Unggoy, nicknamed Grunts by the UNSC, are a sapient species and one of the former client species of the Covenant. The Unggoy occupied the lowest tier in the Covenant's caste system, and comprised the majority of the hegemony's labor force as slaves or serfs; consequently, they are near-ubiquitous across the Covenant sphere. While the Unggoy had some means of social mobility, either in special laborer duties, as merchants or in the clergy, few individuals were fortunate enough to have such opportunities.