Yull

Yull was an Unggoy stationed on the Rapid Conversion and was part of Dadab's group. He was the first true Covenant casualty of the Human-Covenant War (excluding two Jackals killed in a pre-Battle of Harvest confrontation). He killed Osmo by shooting him with a plasma pistol, thus tearing his stomach apart. He was then killed by Tartarus, who pulled off his mask and threw him into a whirlpool and down a series of waterfalls because he ruined the Jiralhanae's plans.

Yull was one of the least intelligent Unggoy on the Rapid Conversion, which was crewed by (for the most part) Unggoy of less-than-average intelligence.